Yazarlar bize Hava Kuvvetleri Office, bilimsel araştırma, sözleşme numarası FA9550-14-1-0128 altında mali desteği minnetle kabul etmiş oluyorsunuz. T. L. A. David ve Lucille Packard Vakfı tarafından kısmi destek de minnetle kabul eder.

MSDS Kimyasalları okuyup tüm kimyasal güvenlik önlemleri, kurum tarafından gerektiği gibi izleyin.
1. birikimi Cl-PProDOT ve Cl-BK
<ol><li>Şekil 1' de gösterildiği gibi özel olarak oluşturulmuş borulu Buhar biriktirme odası yapısını oluşturun.<ol>
<li>2-inç (OD) sigortalı kuvars tüp erimiş yapar 1/4-inç (dış çap, OD) kuvars yan koya. Özel olarak oluşturulmuş bir U-şekil 1-inç paslanmaz çelik tüp ve bir Dewar şişesi ile soğuk bir tuzak yapmak.</li>
		<li>Kuvars tüp bir vakum ölçer ve soğuk tuzak paslanmaz çelik KF bağlayıcıları kullanarak iletişim kurmak ve hızlı kuplajları bağlayın. Monomer bir kuvars ampul yerleştirin ve ampul borulu Odası 1/4-inç ile bağlanmak hızlı kuplajları ve iğneli Vana bağlayın. Oksidan odasında bir pota yerleştirin.</li>
		<li>Ayrı Isıtma bantları kaynakları oksidan, yüzeyler ve monomer için Isıtma olarak kullanın. Gaz girişi ek noble gerekirse işlem basıncı kontrolü için gazlar tanıtmak odası sağ uç köşesinde ekleyin.</li>
	</ol>
</li>
	<li>
Cl-PProDOT birikimi
	<ol>
<li>3,4-propylenedioxythiophene (ProDOT) 50 mg monomer ampül ekleyin ve borulu odasına bağlayın. İğneli Vana açık tutun.</li>
		<li>Yüzeylerde (cam kaymak, kumaşlar, kağıt vb.) odasında koymak. Yüzeylerde 1.3 cm x 2,5 cm uzunluğundadır.</li>
		<li>Ve odasında yer FeCl3 50 mg 5 mL pota içinde ekleyin. Not: Monomer giriş, yüzeyler ve pota göreli konumları şekil 1' de gösterilmektedir. 13 cm monomer giriş ve pota arasındaki mesafedir.</li>
		<li>Pompayı açın. Vana odası sağ ucunda yavaşça kapatın. Sonra dolu bir basınç altında 525 mTorr yer (70 Pa), sıvı nitrojen içinde soğuk tuzak ekleyin.</li>
		<li>Teyp Isıtma ile üç ısıtma bölgeleri sarın ve Isıtma bandı ısı kontrol cihazları bağlayın.</li>
		<li>Ne zaman baskı işleme basınç azalır (52,5 mTorr, 7 Pa), iğneli Vana monomer kapsayıcı kapatın.</li>
		<li>Oksidan, yüzeyler ve 170 ° C, 80 ° C ve 80 ° C, monomer sırasıyla Isıtma başlatın. ~ 10 dk sonra FeCl3 buharlaşmış ve kırmızı FeCl3 katı serin bölgede oluşturulur.</li>
		<li>İğneli Vana monomer kapsayıcı açın. Not: Mavi renkli ince filmler substrat bölgede oluşturulacak. Tipik büyüme oranları ~ 10 nm/dak sağlamak bu FeCl3 buhar odasında iğneli Vana monomer kapsayıcı açmadan önce oluşturulur. Aksi takdirde, monomer FeCl3 katı pota içinde tepki ve oksidan daha da buharlaşma önleyen bir polimer tabaka oluştururlar.</li>
		<li>Ne zaman istenilen kalınlık elde iğneli Vana monomer kapsayıcı kapatın. Tüm Isıtma bandı açmak ve oda sıcaklığında sisteme serin.</li>
		<li>Gaz giriş vanası açmak ve pompa kapatmak.</li>
		<li>Örnek odadan almam. Dikkatle metanol için kalan oksidan ve monomer kaldırmak 30 dk örneklerinde bırakın. Not: Saat durulama film kalınlığı arttıkça artacaktır. 30-dak durulama için 100'den daha ince filmler tipik cam slaytlara nm. Filmler 500 kalın nm durulama zaman--dan belgili tanımlık substrate delaminate.</li>
		<li>Dikkatli bir şekilde darbe kuru azot gazı ile örnekleri.</li>
	</ol>
</li>
	<li>
Cl-BK birikimi
	<ol>
<li>Thieno 50 mg eklemek [3,2 -b] tiyofen (TT) monomer ampül ve borulu odasına bağlayın. İğneli Vana açık tutun.</li>
		<li>1.2.2 adımları yineleyin. 1.2.12 için.</li>
	</ol>
</li>
</ol>2. Br-PEDOT birikimi
<ol><li>
İfade odası kurulumu
	<ol>
<li>Kuvars tüp oksidanlar için bir ek 1/4-inç yan giriş eklemek ve monomer giriş dışında 8 inç yapmak. Sıvı oksidan bir kuvars ampul yere takıp ampul borulu odasına monomer (Şekil 2) aynı şekilde bağlayın.</li>
	</ol>
</li>
	<li>
Br-PEDOT birikimi
	<ol>
<li>3,4-ethylenedioxythiophene (EDOT) 2 mL monomer ampul ekleyin ve ampul borulu odasına bağlayın. İğneli Vana açık tutun.</li>
		<li>Monomer buharı giriş yakınındaki borulu odasında yüzeylerde (cam kaymak, kumaşlar, kağıt vb.) yerleştirin. Belgili tanımlık substrate 1.3 cm x 2,5 cm uzunluğundadır.</li>
		<li>Bir duman hood Br2 2 mL oksidan ampul ekleyin, ampul iğneli Vana bağlanmak ve iğneli vana kapalı tutmak. İğneli Vana kuvars tüp takın. Uyarı: Br2 tehlikeli bir malzemedir. Ele alırken dikkatli olun.</li>
		<li>Pompayı açın. Vana odası sağ ucunda yavaşça kapatın. Sonra dolu bir basınç altında 525 mTorr yer (70 Pa), sıvı nitrojen içinde soğuk tuzak ekleyin.</li>
		<li>Teyp Isıtma ile monomer bölge sarın ve bir sıcaklık denetleyicisi ile bağlayın. Oda sıcaklığında substrat ve oksidan bölge korumak.</li>
		<li>Ne zaman basınç azalır 52,5 mTorr işleme baskısı (7 Pa), oksidan iğneli Vana açın. Not: Tepki çok hızlıdır. Br2 çok uçucu olduğundan mavi PEDOT Filmler monomer giriş yakın oluşturacak.</li>
		<li>Ne zaman istenilen kalınlık elde monomer ve oksidan iğne valfleri kapatın.</li>
		<li>Isıtma bandı açmak ve oda sıcaklığında sisteme serin.</li>
		<li>Gaz giriş vanası açmak ve pompa kapatmak. Örnek odadan almam. Not: Durulama Br2için gerekli değildir-katkılı polimerler.</li>
	</ol>
</li>
</ol>

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Yazarlar ifşa gerek yok.

Oksidatif polimerizasyon reaksiyonu mekanizmasıdır. Mekanizma kullanılarak polimer kaplama yöntemleri electropolymerization17 içerir ve faz polimerizasyon18Buhar. Electropolymerization iletken bir substrat gerektirir, düzgün ve açıkorur kaplama avantajı yoksun ve bir çevre düşmanca yöntemi çözüm göre19yaşında. Varolan buharı faz polimerizasyon yöntemi rapor burada yöntemine benzer, ancak yalnızca son derece geçici olmayan mon...

İletken polimer ve yarıiletken malzemeler esneklik1, esnekliği2, oluşturmak için olağanüstü fırsatlar sağlayan şeffaflık3ve düşük yoğunluklu,4 gibi benzersiz özellikleri vardır geleneksel olmayan yüzeylerde yeni nesil elektronik cihazlarda. Şu anda, pek çok araştırmacı esnek oluşturmak için polimer malzemeler ve/veya giyilebilir elektronik5,6 , akıllı Tekstil7benzersiz özelliklerini yararlanmak için gayret. Ancak, son derece dokulu yüzeyler ve kağıt, kumaş ve konu/iplikler, gibi sağlam olmayan yüzeylerde açıkorur kat yeteneği unmastered kalır. En sık, polimer sentez ve çözüm yöntemleri kullanarak yüzeylerde boyalı. 8 , 9 , 10 , 11 , 12 çözüm yöntemleri kaplı polimer lifleri/Tekstil sağlasa, böylece elde edilen kaplamalar üniform olmayan ve küçük fiziksel gerilmeler13,14 tarafından kolayca hasarlı çoğu kez. Çözüm yöntemleri kaplama kağıdı için geçerli değildir, aynı zamanda sorunları ıslatma yüzünden.
Reaktif Buhar biriktirme yüzeylerde yüzey kimya/kompozisyon, yüzey enerji ve Yüzey pürüzlülük/topografi15bakılmaksızın çeşitli bir yelpazede açıkorur konjuge polimer filmler oluşturabilirsiniz. Bu yaklaşım, aynı anda bir yüzeye monomer ve oksidan buharlar sunarak buharı aşamasında konjüge polimerler sentezlenmiş. Bir tek, solventsiz adım yüzey üzerinde polimerizasyon ve film oluşumu oluşur. Bu yöntem teorik olarak çözüm yöntemleri kullanarak oksidatif polimerizasyon tarafından sentezlenen konjuge herhangi bir polimer için geçerlidir. Ancak, bugüne kadar konjuge polimer yapıları sadece dar bir dizi yatırmak için iletişim kuralları denir. 15
Burada, biz göstermek devrilmesinden sonra iletken poly(3,4-ethylenedioxythiophene) (PEDOT) ve poly(3,4-propylenedioxythiophene) (PProDOT) ve yarıiletken Poli (thieno [3,2 -b] tiyofen) (BK) filmleri ile reaktif Buhar biriktirme. İki türlü oksidanlar, katı FeCl3 ve sıvı Br2, süreç içinde kullanılır. Karşılık gelen polimerler Cl-PProDOT, Cl-BK ve Br-PEDOT adlandırılır. Hem geleneksel yüzeyler, cam slaytlar ve kağıt, havlu ve kumaşlar, gibi alışılmamış dokulu yüzeyler polimer film ile kaplı.
Bu iletişim kuralı, özel olarak oluşturulmuş buharı ifade odasının kurulum ve biriktirme işleminin ayrıntılarını açıklar. Yeni Uygulayıcıları kendi biriktirme sistemi kurmak ve buharı fazlı sentezi ile ilişkili ortak tuzaklardan kaçınmak yardımcı olmak içindir.

<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

Açıkorur konjüge polimerler rasgele yüzeylerde özel olarak tasarlanmış, alçak basınç reaksiyonu odası kullanarak üzerinde kaplama yöntemi göstermektedir. İletken polimerler, poly(3,4-ethylenedioxythiophene) (PEDOT) ve poly(3,4-propylenedioxythiophene) (PProDOT) ve bir yarıiletken polimer, Poli (thieno [3,2 -b] tiyofen) (BK), alışılmamış üzerinde son derece düzensiz tevdi ve Kağıt, havlu ve kumaşlar gibi yüksek yüzey alanları ile dokulu yüzeyler. Bu ifade odası önceki buharı reaktörler bir iyileşme sistemimiz 3,4-propylenedioxythiophene ve thieno gibi geçici ve kalıcı monomerleri barındırabilir çünkü rapor [3,2 -b] tiyofen. Katı ve sıvı oksidanlar kullanımı de gösterdi. Bu yöntemin bir sınırlama bu sofistike situ içinde kalınlık monitörler yoksun olması. Polimer kaplamalar spin-kaplama ve yüzey aşılama gibi yaygın olarak kullanılan çözüm tabanlı kaplama yöntemleri tarafından yapılan tek tip veya mekanik bozulma için duyarlı değildir. Bu buharı faz biriktirme yöntemi bu sakıncaları üstesinden gelir ve ortak çözüm tabanlı kaplama yöntemleri için güçlü bir alternatif bildirdi. Özellikle, polimer Filmler tarafından bildirilen yöntemi kaplı düzgün ve mikrometre ölçekte bile pürüzlü yüzeylerde açıkorurdur. Bu özellik için esnek ve yüksek dokulu yüzeyler üzerinde elektronik cihazlarda yatırılır buharı polimerlerin yönelik uygulama sağlar.

1.3 cm x 2,5 cm cam slaytlara ayrı yanal pozisyonlarda Merkezi tüp boyunca yerleştirilen oluşan Cl-PProDOT film kalınlığı bir profilometer (şekil 3) tarafından ölçülen. İletkenlikleri ev yapımı dört maddelik sonda test istasyonu kullanarak direnci ölçüleri hesaplanır. Bir 100-nm kalın Cl-PProDOT film cam slaytlara ölçülen iletkenlik 106 S/cm, bu film bir potansiyel elektrot malzeme olarak hak kazanmak yeterli olan dür. <strong class=...

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

Reaktif Buhar biriktirme rasgele yüzeylerde konjuge polimer filmleri

Bu kağıt, poly(3,4-ethylenedioxythiophene), poly(3,4-propylenedioxythiophene) ve poli reaktif Buhar biriktirme için bir protokol sunar (thieno [3,2 -b] tiyofen) Filmler cam slaytlar ve pürüzlü yüzeylerde, Tekstil ve kağıt gibi.

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 Görüntüleme.  University of Wisconsin-Madison. Bu kağıt, poly(3,4-ethylenedioxythiophene), poly(3,4-propylenedioxythiophene) ve poli reaktif Buhar biriktirme için bir protokol sunar (thieno [3,2 -b] tiyofen) Filmler cam slaytlar ve pürüzlü yüzeylerde, Tekstil ve kağıt gibi.

Video: 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.

Plazma ile Hidrofobik Metal-Organik Altyapıları hazırlanması Amonyak Kaldırma için perfluorobütanlar Kimyasal Buhar Kaplama Geliştirilmiş

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

Kimya

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.

Camsı karbon ve flüor katkılı kalay oksit elektrotlar üzerinde vinil içerikli poli-piridil Kompleksinin indirgeyici elektrokimyasal

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.

Geniş alanlı Fabrikasyon Ultrathin Polimer Filmler Serbest ayakta

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.

Katman-katman Sentezi ve Müstakil Konjuge mikro gözenekli polimer Nanomembranlar Devri

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.

Bir görünür ışık fotokatalistinin olarak Perylene kullanarak Fonksiyonlu Vinil Monomer Atom Transfer Radikal Polimerizasyonu

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.

Elektroaktif Polimer nanopartiküller Sergileme Fototermal Özellikleri

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

Mühendislik

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.

Fırça benzeri ile reaktif yüzeyler imalatı ve Azlactone Functionalized blok ortak polimerler çapraz filmleri

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.

Polimer filmlerin küçültülmüş kusurlarla gözenekli substratlar üzerine aktarımı için prosedür

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.

Çözüm Biriktirmeden Verimli OLED'lerin Geliştirilmesi

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.

Elektroaktif Poli'nin (3,4-etilendioksitiyofen) Elektroeğrilmiş Emtia Polimer Nanofiberler Üzerine Buhar Fazı Biriktirmesi

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