作者衷心感谢美国空军科研办公室在协议编号 FA9550-14-1-0128 的资助。t.l.a. 还衷心感谢大卫和露西尔基金会的部分支持。

为试剂阅读 MSDS, 并按照贵机构的要求, 遵守所有化学安全措施。
1. PProDOT 和氯-PTT 的沉积
<ol><li>建立 custom-built 管状气相沉积室的结构, 如图 1所示。<ol>
<li>做一个1/4 的. (外径, 外径) 熔融石英侧入口到 2 in. (外径) 熔融石英管。用 custom-built U 形1的不锈钢管和杜瓦瓶做一个冷的陷阱。</li>
		<li>使用不锈钢 KF 连接器和快速连接接头将石英管与真空计和冷阱连接。将单体放在石英安瓿中, 并将安瓿连接到管状腔内, 通过 1/4-in. 快连接联轴器和针阀。将氧化剂放在室内的坩埚中。</li>
		<li>使用单独的加热带作为氧化剂、基质和单体的热源。在腔室的右端添加一个气体入口, 以引入额外的惰性气体, 以便在必要时控制过程压力。</li>
	</ol>
</li>
	<li>
氯 PProDOT 的沉积
	<ol>
<li>在单体安瓿中加入50毫克的 34-propylenedioxythiophene (ProDOT), 并将其连接到管状腔内。保持针阀开启。</li>
		<li>将衬底 (玻璃滑梯、布料、纸张等) 放在室内。基体的大小是 1.3 cm x 2.5 cm。</li>
		<li>添加50毫克的 FeCl3在一个5毫升的坩埚, 并把它放在会议厅。 注: 单体入口、衬底和坩埚的相对位置显示在图 1中。单体入口与坩埚之间的距离为13厘米。</li>
		<li>打开水泵。慢慢关闭右端的阀门。室压低于 525 mTorr (70 Pa) 后, 在冷阱中加入液氮。</li>
		<li>用加热带将三加热区包裹起来, 并将加热带连接到温度控制器。</li>
		<li>当压力降低到加工压力 (52.5 mTorr, 7 Pa) 时, 关闭单体容器的针阀。</li>
		<li>开始加热氧化剂, 基板和单体在170° c, 80 ° c, 和80° c 分别。在10分钟后, FeCl3被汽化, 并且红色 FeCl3实体在凉爽的区域中形成。</li>
		<li>打开单体容器的针阀。 注: 在承印物区域将形成蓝色的薄膜。典型的增长率是〜 10 nm/分钟. 确保在打开单体容器的针阀之前, 在腔室中形成 FeCl 的3蒸气。否则, 单体将与 FeCl 的3固体在坩埚中反应, 形成聚合物层, 防止氧化剂进一步汽化。</li>
		<li>当所需的厚度达到时, 关闭单体容器的针阀。关掉所有的暖气胶带, 冷却系统到室温。</li>
		<li>打开进气阀门, 关闭泵。</li>
		<li>把样品从房间里拿出来。将样品在甲醇中仔细浸泡30分钟, 除去残余氧化剂和单体。 注: 冲洗时间应随着薄膜厚度的增加而增加。30分钟冲洗是典型的薄膜薄比 100 nm 在玻璃幻灯片。当冲洗时, 厚于500纳米的薄膜可能会从基体分层。</li>
		<li>小心地用氮气吹干样品。</li>
	</ol>
</li>
	<li>
沉积的氯-PTT
	<ol>
<li>在单体安瓿中加入50毫克的 2,3-c [32-b] 噻吩 (TT), 并将其连接到管状腔内。保持针阀开启。</li>
		<li>重复步骤1.2.2。1.2.12。</li>
	</ol>
</li>
</ol>2. Br-PEDOT 的沉积
<ol><li>
沉积室设置
	<ol>
<li>添加一个额外的1/4 个. 侧向进口氧化剂的石英管, 使它8在. 除了单体入口。将液体氧化剂放置在石英安瓿中, 并将安瓿与单体 (图 2) 的方式连接到管腔。</li>
	</ol>
</li>
	<li>
Br-PEDOT 的沉积
	<ol>
<li>在单体安瓿中加入2毫升的 34-吩 (EDOT), 并将安瓿连接到管腔。保持针阀开启。</li>
		<li>将基板 (玻片、织物、纸张等) 放置在单体蒸汽入口附近的管状腔内。基体的大小是 1.3 cm x 2.5 cm。</li>
		<li>在油烟罩中, 在氧化剂安瓿中加入2毫升的 Br2 , 将安瓿连接到针阀, 并保持针阀关闭。将针阀连接至石英管。 警告:Br2是一种有害物质。在处理时使用警告。</li>
		<li>打开水泵。慢慢关闭右端的阀门。室压低于 525 mTorr (70 Pa) 后, 在冷阱中加入液氮。</li>
		<li>用加热带将单体区域包裹起来, 并将其与温度控制器连接。在室温下保持基体和氧化剂的区域。</li>
		<li>当压力降低到 52.5 mTorr (7 Pa) 的加工压力时, 打开氧化剂的针阀。 注意: 反应非常快。蓝 PEDOT 薄膜将形成接近单体入口, 因为 Br2是非常不稳定的。</li>
		<li>当所需的厚度达到时, 关闭单体和氧化剂的针阀。</li>
		<li>关闭加热胶带, 将系统冷却至室温。</li>
		<li>打开进气阀门, 关闭泵。把样品从房间里拿出来。 注: Br2掺杂聚合物不需要漂洗。</li>
	</ol>
</li>
</ol>

<ol>
	<li>Kaltenbrunner, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ultrathin+and+lightweight+organic+solar+cells+with+high+flexibility.">Ultrathin and lightweight organic solar cells with high flexibility.</a> Nat. Commun. 3, 770 (2012).</li><li>Savagatrup, S., Printz, A. D., O'Connor, T. F., Zaretski, A. V., Lipomi, D. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Molecularly+Stretchable+Electronics.">Molecularly Stretchable Electronics.</a> Chem. Mater. 26, 3028-3041 (2014).</li><li>Lee, J. -. Y., Connor, S. T., Cui, Y., Peumans, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Semitransparent+Organic+Photovoltaic+Cells+with+Laminated+Top+Electrode.">Semitransparent Organic Photovoltaic Cells with Laminated Top Electrode.</a> Nano Lett. 10, 1276-1279 (2010).</li><li>Kaltenbrunner, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+ultra-lightweight+design+for+imperceptible+plastic+electronics.">An ultra-lightweight design for imperceptible plastic electronics.</a> Nature. 499, 458-463 (2013).</li><li>Jost, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Carbon+coated+textiles+for+flexible+energy+storage.">Carbon coated textiles for flexible energy storage.</a> Energy Environ. Sci. 4, 5060-5067 (2011).</li><li>Hu, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stretchable,+Porous,+and+Conductive+Energy+Textiles.">Stretchable, Porous, and Conductive Energy Textiles.</a> Nano Lett. 10, 708-714 (2010).</li><li>Jost, K., Dion, G., Gogotsi, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Textile+energy+storage+in+perspective.">Textile energy storage in perspective.</a> J. Mater. Chem. A. 2, 10776-10787 (2014).</li><li>Ding, Y., Invernale, M. A., Sotzing, G. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Conductivity+Trends+of+PEDOT-PSS+Impregnated+Fabric+and+the+Effect+of+Conductivity+on+Electrochromic+Textile.">Conductivity Trends of PEDOT-PSS Impregnated Fabric and the Effect of Conductivity on Electrochromic Textile.</a> ACS Appl. Mater. Interfaces. 2, 1588-1593 (2010).</li><li>Hong, K. H., Oh, K. W., Kang, T. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preparation+and+properties+of+electrically+conducting+textiles+by+in+situ+polymerization+of+poly(3,4-ethylenedioxythiophene).">Preparation and properties of electrically conducting textiles by in situ polymerization of poly(3,4-ethylenedioxythiophene).</a> J. Appl. Polym. Sci. 97, 1326-1332 (2005).</li><li>Xu, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fabric+electrodes+coated+with+polypyrrole+nanorods+for+flexible+supercapacitor+application+prepared+via+a+reactive+self-degraded+template.">Fabric electrodes coated with polypyrrole nanorods for flexible supercapacitor application prepared via a reactive self-degraded template.</a> Org. Electron. 26, 292-299 (2015).</li><li>Du, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Thermoelectric+Fabrics:+Toward+Power+Generating+Clothing.">Thermoelectric Fabrics: Toward Power Generating Clothing.</a> Sci. Rep. 5, 6411 (2015).</li><li>Yatvin, J., Sherman, S. A., Filocamo, S. F., Locklin, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+functionalization+of+Kevlar[registered+sign]+with+copolymers+containing+sulfonyl+nitrenes.">Direct functionalization of Kevlar[registered sign] with copolymers containing sulfonyl nitrenes.</a> Polym. Chem. 6, 3090-3097 (2015).</li><li>Musumeci, C., Hutchison, J. A., Samori, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Controlling+the+morphology+of+conductive+PEDOT+by+in+situ+electropolymerization:+from+thin+films+to+nanowires+with+variable+electrical+properties.">Controlling the morphology of conductive PEDOT by in situ electropolymerization: from thin films to nanowires with variable electrical properties.</a> Nanoscale. 5, 7756-7761 (2013).</li><li>Allison, L., Hoxie, S., Andrew, T. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Towards+seamlessly-integrated+textile+electronics:+methods+to+coat+fabrics+and+fibers+with+conducting+polymers+for+electronic+applications.">Towards seamlessly-integrated textile electronics: methods to coat fabrics and fibers with conducting polymers for electronic applications.</a> Chem. Commun. 53, 7182-7193 (2017).</li><li>Alf, M. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chemical+Vapor+Deposition+of+Conformal,+Functional,+and+Responsive+Polymer+Films.">Chemical Vapor Deposition of Conformal, Functional, and Responsive Polymer Films.</a> Adv. Mater. 22, 1993-2027 (2010).</li><li>Goktas, H., Wang, X., Boscher, N. D., Torosian, S., Gleason, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Functionalizable+and+electrically+conductive+thin+films+formed+by+oxidative+chemical+vapor+deposition+(oCVD)+from+mixtures+of+3-thiopheneethanol+(3TE)+and+ethylene+dioxythiophene+(EDOT).">Functionalizable and electrically conductive thin films formed by oxidative chemical vapor deposition (oCVD) from mixtures of 3-thiopheneethanol (3TE) and ethylene dioxythiophene (EDOT).</a> J. Mater. Chem. C. 4, 3403-3414 (2016).</li><li>Sadki, S., Schottland, P., Brodie, N., Sabouraud, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+mechanisms+of+pyrrole+electropolymerization.">The mechanisms of pyrrole electropolymerization.</a> Chem. Soc. Rev. 29, 283-293 (2000).</li><li>Bhattacharyya, D., Howden, R. M., Borrelli, D. C., Gleason, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vapor+phase+oxidative+synthesis+of+conjugated+polymers+and+applications.">Vapor phase oxidative synthesis of conjugated polymers and applications.</a> J. Polym. Sci., Part B: Polym. Phys. 50, 1329-1351 (2012).</li><li>Yamato, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Synthesis+of+free-standing+poly(3,4-ethylenedioxythiophene)+conducting+polymer+films+on+a+pilot+scale.">Synthesis of free-standing poly(3,4-ethylenedioxythiophene) conducting polymer films on a pilot scale.</a> Synth. Met. 83, 125-130 (1996).</li><li>Cheng, N., Zhang, L., Joon Kim, J., Andrew, T. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vapor+phase+organic+chemistry+to+deposit+conjugated+polymer+films+on+arbitrary+substrates.">Vapor phase organic chemistry to deposit conjugated polymer films on arbitrary substrates.</a> J. Mater. Chem. C. 5, 5787-5796 (2017).</li><li>Borrelli, D. C., Lee, S., Gleason, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optoelectronic+properties+of+polythiophene+thin+films+and+organic+TFTs+fabricated+by+oxidative+chemical+vapor+deposition.">Optoelectronic properties of polythiophene thin films and organic TFTs fabricated by oxidative chemical vapor deposition.</a> J. Mater. Chem. C. 2, 7223-7231 (2014).</li><li>Jo, W. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Oxidative+Chemical+Vapor+Deposition+of+Neutral+Hole+Transporting+Polymer+for+Enhanced+Solar+Cell+Efficiency+and+Lifetime.">Oxidative Chemical Vapor Deposition of Neutral Hole Transporting Polymer for Enhanced Solar Cell Efficiency and Lifetime.</a> Adv. Mater. 28, 6399-6404 (2016).</li><li>Wang, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=CVD+Polymers+for+Devices+and+Device+Fabrication.">CVD Polymers for Devices and Device Fabrication.</a> Adv. Mater. 29, 1604606 (2017).</li><li>Kovacik, P., Hierro, G. d., Livernois, W., Gleason, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Scale-up+of+oCVD:+large-area+conductive+polymer+thin+films+for+next-generation+electronics.">Scale-up of oCVD: large-area conductive polymer thin films for next-generation electronics.</a> Mater. Horiz. 2, 221-227 (2015).</li><li>Barr, M. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+Monolithic+Integration+of+Organic+Photovoltaic+Circuits+on+Unmodified+Paper.">Direct Monolithic Integration of Organic Photovoltaic Circuits on Unmodified Paper.</a> Adv. Mater. 23, 3500-3505 (2011).</li></ol>

作者没有什么可透露的。

反应的机理是氧化聚合。采用相同机理的聚合物涂层方法包括聚合17和气相聚合法18。聚合需要导电衬底, 缺乏均匀和保形涂层的优势, 是一种环境不友好的解决方法19。现有的气相聚合方法与这里所报道的方法相似, 但只能聚合高挥发性单体20。我们的方法改进了现有方法的腔室设计, 不仅能聚合高挥发性单体, 而且还能不稳定?...

聚合物导电和半导体材料具有独特的特性, 如灵活性1、拉伸2、透明3和低密度、4 , 它为创建下一代电子设备在非传统的基板上。目前, 许多研究人员正在努力利用高分子材料的独特特性来创造灵活和/或耐磨的电子产品5,6和智能纺织品7。然而, 形涂层的能力高纹理表面和 non-robust 基板, 如纸张, 织物和线程/纱线, 仍然 unmastered。最常见的是, 用溶液方法合成和涂覆在表面的聚合物。8,9,10,11,12虽然解决方法提供了聚合物涂层纤维/纺织品, 但由此获得的涂层通常不均匀, 容易受到小物理应力的破坏13,14 。由于润湿问题, 解决方法也不适用于涂布纸。
活性气相沉积可以在不同的基底上产生共形共轭聚合物膜, 无论表面化学/成分, 表面能和表面粗糙度/地形15。在这种方法中, 共轭聚合物在蒸汽相中合成, 同时将单体和氧化剂蒸气输送到表面。聚合和膜的形成发生在一个单一的, 无溶剂的步骤表面。这种方法在理论上适用于任何可以用溶液法合成的共轭聚合物。然而, 到目前为止, 只存放一组狭窄的共轭聚合物结构的协议是已知的。15
在这里, 我们演示了导电聚 (34-吩) (PEDOT) 和聚 (34-propylenedioxythiophene) (PProDOT), 和半导体聚 (2,3-c [32-b] 噻吩) (PTT) 薄膜通过反应气相沉积。两种氧化剂, 固体 FeCl3和液体 Br2, 在该过程中使用。相应的聚合物被命名为 PProDOT、cl-PTT 和 Br-PEDOT。传统的基板, 玻璃幻灯片, 和非传统的纹理基板, 如纸, 毛巾和织物, 都涂上了聚合物薄膜。
本协议描述了 custom-built 气相沉积室的设置和沉积过程的细节。它的目的是帮助新的从业者建立他们的沉积系统, 避免与气相合成相关的常见缺陷。

<table><tbody><tr><td>3,4-Ethylenedioxythiophene, 97%</td><td>Sigma Aldrich</td><td>483028</td><td></td></tr><tr><td>3,4-Propylenedioxythiophene, 97%</td><td>Sigma Aldrich</td><td>660485</td><td></td></tr><tr><td>Thieno[3,2-b]thiophene, 95%</td><td>Sigma Aldrich</td><td>702668</td><td></td></tr><tr><td>FeCl&lt;sub&gt;3&lt;/sub&gt;, 97%</td><td>Sigma Aldrich</td><td>157740</td><td></td></tr><tr><td>Br&lt;sub&gt;2&lt;/sub&gt;</td><td>Sigma Aldrich</td><td>207888</td><td></td></tr></tbody></table>

reactive vapor deposition of conjugated polymer films on arbitrary substrates

我们演示了一种形涂层共轭聚合物在任意基底上使用定制设计的低压反应室的方法。导电聚合物, 聚 (34-吩) (PEDOT) 和聚 (34-propylenedioxythiophene) (PProDOT), 和一个半导体聚合物, 聚 (2,3-c [32-b] 噻吩) (PTT), 沉积在非传统的高度无序和具有高表面积的纹理基质, 如纸、毛巾和织物。这一报告的沉积室是以前的蒸气反应堆的改进, 因为我们的系统可以同时容纳挥发性和非挥发单体, 如 34-propylenedioxythiophene 和 2,3-c [32-b] 噻吩。同时也证明了固体和液态氧化剂的利用。这种方法的一个局限性是它缺乏复杂的原位厚度监视器。通常采用的解决涂层方法 (如自旋涂层和表面接枝) 所制成的聚合物涂层通常不均匀或易受机械降解的影响。这种报告的气相沉积方法克服了这些缺点, 是一种很强的替代普通解决涂层方法。值得注意的是, 被报道的方法涂覆的聚合物薄膜在粗糙表面上是均匀和共形的, 即使在微米尺度上也是如此。这一特性允许在柔性和高质感的基板上应用蒸汽沉积聚合物在电子设备上。

在 1.3 cm x 2.5 cm 玻璃幻灯片上形成的 PProDOT 薄膜的厚度, 在沿中心管的离散侧向位置上由一个仪 (图 3) 测量。电导率是用国产四点探针测站测量的。在玻片上的 100 nm 厚的氯 PProDOT 薄膜的电导率是 106s/厘米, 这是足够的资格这部电影作为一个潜在的电极材料。图 4是在玻片上的 100 nm PProDOT 胶片的 AFM 图像。收集了在冲洗前后的玻片...

Watch this Scientific Journal Video about Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates at JoVE.com

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

任意基底上共轭聚合物薄膜的反应气相沉积

本文介绍了在玻片和粗糙衬底上的聚 (34-吩)、聚 (34-propylenedioxythiophene) 和聚 (2,3-c [32-b] 噻吩) 薄膜的活性气相沉积的协议, 如纺织品和纸张。

We demonstrate a method of conformally coating conjugated polymers on arbitrary substrates using a custom-designed, low-pressure reaction chamber. ...

reactive-vapor-deposition-conjugated-polymer-films-on-arbitrary

Universidad de Cartagena UDEC

Research

JoVE Journal

Chemistry

33.6K 次观看.  University of Wisconsin-Madison. 本文介绍了在玻片和粗糙衬底上的聚 (34-吩)、聚 (34-propylenedioxythiophene) 和聚 (2,3-c [32-b] 噻吩) 薄膜的活性气相沉积的协议, 如纺织品和纸张。

视频: Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Plasma enhanced chemical vapor deposition (PECVD) of perfluoroalkanes has long been studied for tuning the wetting properties of surfaces. For high surface area microporous materials, such as metal-organic frameworks (MOFs), unique challenges present themselves for PECVD treatments. Herein the protocol for development of a MOF that was previously unstable to humid conditions is presented. The protocol describes the synthesis of Cu-BTC (also known as HKUST-1), the treatment of Cu-BTC with PECVD of perfluoroalkanes, the aging of materials under humid conditions, and the subsequent ammonia microbreakthrough experiments on milligram quantities of microporous materials. Cu-BTC has an extremely high surface area (~1,800 m2/g) when compared to most materials or surfaces that have been previously treated by PECVD methods. Parameters such as chamber pressure and treatment time are extremely important to ensure the perfluoroalkane plasma penetrates to and reacts with the inner MOF surfaces. Furthermore, the protocol for ammonia microbreakthrough experiments set forth here can be utilized for a variety of test gases and microporous materials.

Herein the procedures for plasma enhanced chemical vapor deposition of perfluoroalkanes on microporous materials such as metal-organic frameworks to enhance their stability and hydrophobicity are described. Furthermore, breakthrough testing of milligram quantities of samples is described in detail.

增强型氟烷烃的化学气相沉积等离子通过疏水金属 - 有机骨架的制备氨的去除

Plasma enhanced chemical vapor deposition (PECVD) of perfluoroalkanes has long been studied for tuning the wetting properties of surfaces. For high ...

科研

化学

Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes

Controllable electrode surface modification is important in a number of fields, especially those with solar fuels applications. Electropolymerization is one surface modification technique that electrodeposits a polymeric film at the surface of an electrode by utilizing an applied potential to initiate the polymerization of substrates in the Helmholtz layer. This useful technique was first established by a Murray-Meyer collaboration at the University of North Carolina at Chapel Hill in the early 1980s and utilized to study numerous physical phenomena of films containing inorganic complexes as the monomeric substrate. Here, we highlight a procedure for coating electrodes with an inorganic complex by performing reductive electropolymerization of the vinyl-containing poly-pyridyl complex onto glassy carbon and fluorine doped tin oxide coated electrodes. Recommendations on electrochemical cell configurations and troubleshooting procedures are included. Although not explicitly described here, oxidative electropolymerization of pyrrole-containing compounds follows similar procedures to vinyl-based reductive electropolymerization but are far less sensitive to oxygen and water.

A procedure for performing reductive electropolymerization of vinyl-containing compounds onto glassy carbon and fluorine doped tin-oxide coated electrodes is presented. Recommendations on electrochemical cell configurations and troubleshooting procedures are included. Although not explicitly described here, oxidative electropolymerization of pyrrole-containing compounds follows similar procedures to vinyl-based reductive electropolymerization.

在玻碳和氟掺杂的氧化锡电极的含乙烯基聚吡啶基复合还原电聚合

Controllable electrode surface modification is important in a number of fields, especially those with solar fuels applications. Electropolymerization is ...

Fabrication of Large-area Free-standing Ultrathin Polymer Films

This procedure describes a method for the fabrication of large-area and ultrathin free-standing polymer films. Typically, ultrathin films are prepared using either sacrificial layers, which may damage the film or affect its mechanical properties, or they are made on freshly cleaved mica, a substrate that is difficult to scale. Further, the size of ultrathin film is typically limited to a few square millimeters. In this method, we modify a surface with a polyelectrolyte that alters the strength of adhesion between polymer and deposition substrate. The polyelectrolyte can be shown to remain on the wafer using spectroscopy, and a treated wafer can be used to produce multiple films, indicating that at best minimal amounts of the polyelectrolyte are added to the film. The process has thus far been shown to be limited in scalability only by the size of the coating equipment, and is expected to be readily scalable to industrial processes. In this study, the protocol for making the solutions, preparing the deposition surface, and producing the films is described.

We describe a method for the fabrication of large-area (up to 13 cm diameter) and ultrathin (as thin as 8 nm) polymer films. Instead of using a sacrificial interlayer to delaminate the film from its substrate, we use a self-limiting surface treatment suitable for arbitrarily large areas.

大面积的制造自立性的超薄聚合物薄膜

This procedure describes a method for the fabrication of large-area and ultrathin free-standing polymer films.  Typically, ultrathin films are prepared ...

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

CMP as large surface area materials have attracted growing interest recently, due to their high variability in the incorporation of functional groups in combination with their outstanding thermal and chemical stability, and low densities. However, their insoluble nature causes problems in their processing since usually applied techniques such as spin coating are not available. Especially for membrane applications, where the processing of CMP as thin films is desirable, the processing problems have hindered their commercial application.
Here we describe the interfacial synthesis of CMP thin films on functionalized substrates via molecular layer-by-layer (l-b-l) synthesis. This process allows the preparation of films with desired thickness and composition and even desired composition gradients.
The use of sacrificial supports allows the preparation of freestanding membranes by dissolution of the support after the synthesis. To handle such ultra-thin freestanding membranes the protection with sacrificial coatings showed great promise, to avoid rupture of the nanomembranes. To transfer the nanomembranes to the desired substrate, the coated membranes are upfloated at the air-liquid interface and then transferred via dip coating.

In this paper we describe the interfacial synthesis of conjugated microporous polymers (CMP) on sacrificial substrates, and the dissolution of the substrate for the preparation of freestanding CMP nanomembranes. In addition, we will describe how the fragile nanomembranes can be transferred to other substrates.

层 - 层的合成和独立式共轭微孔聚合物纳米薄膜的转移

CMP as large surface area materials have attracted growing interest recently, due to their high variability in the incorporation of functional groups in ...

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

A standardized technique for atom transfer radical polymerization of vinyl monomers using perylene as a visible-light photocatalyst is presented. The procedure is performed under an inert atmosphere using air- and water-exclusion techniques. The outcome of the polymerization is affected by the ratios of monomer, initiator, and catalyst used as well as the reaction concentration, solvent, and nature of the light source. Temporal control over the polymerization can be exercised by turning the visible light source off and on. Low dispersities of the resultant polymers as well as the ability to chain-extend to form block copolymers suggest control over the polymerization, while chain end-group analysis provides evidence supporting an atom-transfer radical polymerization mechanism.

A method for the atom transfer radical polymerization of functionalized vinyl monomers using perylene as a visible-light photocatalyst is described.

使用苝作为可见光光催化功能化的乙烯基单体原子转移自由基聚合

A standardized technique for atom transfer radical polymerization of vinyl monomers using perylene as a visible-light photocatalyst is presented. The ...

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

A method for the synthesis of electroactive polymers is demonstrated, starting with the synthesis of extended conjugation monomers using a three-step process that finishes with Negishi coupling. Negishi coupling is a cross-coupling process in which a chemical precursor is first lithiated, followed by transmetallation with ZnCl2. The resultant organozinc compound can be coupled to a dibrominated aromatic precursor to give the conjugated monomer. Polymer films can be prepared via electropolymerization of the monomer and characterized using cyclic voltammetry and ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy. Nanoparticles (NPs) are prepared via emulsion polymerization of the monomer using a two-surfactant system to yield an aqueous dispersion of the polymer NPs. The NPs are characterized using dynamic light scattering, electron microscopy, and UV-Vis-NIR-spectroscopy. Cytocompatibility of NPs is investigated using the cell viability assay. Finally, the NP suspensions are irradiated with a NIR laser to determine their effectiveness as potential materials for photothermal therapy (PTT).

A protocol is presented for the synthesis and preparation of nanoparticles consisting of electroactive polymers.

电活性聚合物纳米粒子参展光热特性

A method for the synthesis of electroactive polymers is demonstrated, starting with the synthesis of extended conjugation monomers using a three-step ...

工程学

Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers

In this paper, fabrication methods that generate novel surfaces using the azlactone-based block co-polymer, poly (glycidyl methacrylate)-block-poly (vinyl dimethyl azlactone) (PGMA-b-PVDMA), are presented. Due to the high reactivity of azlactone groups towards amine, thiol, and hydroxyl groups, PGMA-b-PVDMA surfaces can be modified with secondary molecules to create chemically or biologically functionalized interfaces for a variety of applications. Previous reports of patterned PGMA-b-PVDMA interfaces have used traditional top-down patterning techniques that generate non-uniform films and poorly controlled background chemistries. Here, we describe customized patterning techniques that enable precise deposition of highly uniform PGMA-b-PVDMA films in backgrounds that are chemically inert or that have biomolecule-repellent properties. Importantly, these methods are designed to deposit PGMA-b-PVDMA films in a manner that completely preserves azlactone functionality through each processing step. Patterned films show well-controlled thicknesses that correspond to polymer brushes (~90 nm) or to highly crosslinked structures (~1-10 &#956;m). Brush patterns are generated using either the parylene lift-off or interface directed assembly methods described and are useful for precise modulation of overall chemical surface reactivity by adjusting either the PGMA-b-PVDMA pattern density or the length of the VDMA block. In contrast, the thick, crosslinked PGMA-b-PVDMA patterns are obtained using a customized micro-contact printing technique and offer the benefit of higher loading or capture of secondary material due to higher surface area to volume ratios. Detailed experimental steps, critical film characterizations, and trouble-shooting guides for each fabrication method are discussed.

Surface fabrication methods for patterned deposition of nanometer thick brushes or micron thick, crosslinked films of an azlactone block co-polymer are reported. Critical experimental steps, representative results, and limitations of each method are discussed. These methods are useful for creating functional interfaces with tailored physical features and tunable surface reactivity.

Azlactone 功能块共聚物的刷状和交联膜制备反应表面

In this paper, fabrication methods that generate novel surfaces using the azlactone-based block co-polymer, poly (glycidyl methacrylate)-block-poly (vinyl ...

Procedure for the Transfer of Polymer Films Onto Porous Substrates with Minimized Defects

The fabrication of devices containing thin film composite membranes necessitates the transfer of these films onto the surfaces of arbitrary support substrates. Accomplishing this transfer in a highly controlled, mechanized, and reproducible manner can eliminate the creation of macroscale defect structures (e.g., tears, cracks, and wrinkles) within the thin film that compromise device performance and the usable area per sample. Here, we describe a general protocol for the highly controlled and mechanized transfer of a polymeric thin film onto an arbitrary porous support substrate for eventual use as a water filtration membrane device. Specifically, we fabricate a block copolymer (BCP) thin film on top of a sacrificial, water-soluble poly(acrylic acid) (PAA) layer and silicon wafer substrate. We then utilize a custom-designed, 3D-printed transfer tool and drain chamber system to deposit, lift-off, and transfer the BCP thin film onto the center of a porous anodized aluminum oxide (AAO) support disc. The transferred BCP thin film is shown to be consistently placed onto the center of the support surface due to the guidance of the meniscus formed between the water and the 3D-printed plastic drain chamber. We also compare our mechanized transfer-processed thin films to those that have been transferred by hand with the use of tweezers. Optical inspection and image analysis of the transferred thin films from the mechanized process confirm that little-to-no macroscale inhomogeneities or plastic deformations are produced, as compared to the multitude of tears and wrinkles produced from manual transfer by hand. Our results suggest that the proposed strategy for thin film transfer can reduce defects when compared to other methods across many systems and applications.

We present a procedure for highly controlled and wrinkle-free transfer of block copolymer thin films onto porous support substrates using a 3D-printed drain chamber. The drain chamber design is of general relevance to all procedures involving transfer of macromolecular films onto porous substrates, which is normally done by hand in an irreproducible fashion.

聚合物薄膜在多孔基板上的转移程序,具有最小化的缺陷

The fabrication of devices containing thin film composite membranes necessitates the transfer of these films onto the surfaces of arbitrary support ...

Development of Efficient OLEDs from Solution Deposition

The use of highly efficient organic emitters based on the thermally activated delayed fluorescence (TADF) concept is interesting due to their 100% internal quantum efficiency. Presented here is a solution deposition method for the fabrication of efficient organic light-emitting diodes (OLEDs) based on a TADF emitter in a simple device structure. This fast, low-cost, and efficient process can be used for all OLED emissive layers that follow the host-guest concept. The fundamental steps are described along with necessary information for further reproduction. The goal to establish a general protocol that can be easily adapted for principal organic emitters currently under study and development.

Presented here is a protocol for the fabrication of efficient, simple, solution-deposited organic light-emitting diodes with low roll-off.

基于溶液沉积的高效OLED开发

The use of highly efficient organic emitters based on the thermally activated delayed fluorescence (TADF) concept is interesting due to their 100% ...

Vapor Phase Deposition of Electroactive Poly(3,4-ethylenedioxythiophene) onto Electrospun Commodity Polymer Nanofibers

This study investigates the preparation of polyacrylonitrile (PAN) nanofibers through electrospinning to create highly porous and strong materials for applications in water purification, electrocatalysis, and biomedicine. The uniformly white PAN nanofiber mats were cut into 2 cm x 2 cm coupons to ensure consistency. After electrospinning, these nanofibers were coated with an electroactive polymer (EAP) using chemical vapor deposition, with iron (III) chloride (FeCl3) serving as an oxidant for polymerizing 3,4-ethylenedioxythiophene (EDOT) into poly(3,4-ethylenedioxythiophene) (PEDOT). The study examined the impact of different FeCl3 concentrations on PEDOT deposition on the PAN coupons. PEDOT deposition led to an increase in coupon weight. Scanning electron microscopy (SEM) revealed increases in the diameter of the nanofibers treated with increasing FeCl3 oxidant concentration, although higher FeCl3&#160;concentrations caused inter-fiber bridging, implying a concomitant decrease in inter-fiber spacing. Energy dispersive X-ray spectroscopy (EDS) was used to confirm the presence of Fe, Cl, and S in the nanofibers, with sulfur content rising with FeCl3&#160;concentration used, suggesting increased PEDOT deposition efficiency with increasing oxidant concentration. Mechanical testing showed that PEDOT-coated PAN fibers had improved tensile strength and toughness in the hydrated state compared to pure PAN nanofibers. These results highlight the crucial role of FeCl3&#160;concentration in influencing the morphology and properties of PAN-PEDOT composites, enhancing their suitability for applications such as water purification, tissue engineering, biosensing, catalysis, and energy storage.

This paper describes a simple technique for coating electrospun PAN nanofibers with electroactive polymers using vapor deposition. The effects of the oxidant FeCl&#8323; on the deposition of poly(3,4-ethylenedioxythiophene) coatings on PAN were investigated to understand and optimize polymer growth, fiber diameter, and overall mechanical strength of the nanofiber mats.

电活性聚（3,4-乙烯二氧噻吩）在电纺商品聚合物纳米纤维上的气相沉积

This study investigates the preparation of polyacrylonitrile (PAN) nanofibers through electrospinning to create highly porous and strong materials for ...