Towards All‐Organic Field‐Effect Transistors by Additive Soft Lithography

Serban, Dana Alina; Greco, Pierpaolo; Melinte, Sorin; Vlad, Alexandru; Duţu, Constantin Augustin; Zacchini, Stefano; Iapalucci, Maria Carmela; Biscarini, Fabio; Cavallini, Massimiliano

doi:10.1002/smll.200801732

Cited by 72 publications

(52 citation statements)

References 49 publications

(18 reference statements)

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“…[6][7][8] In these clusters, triangulo-Pt 3 units bearing both terminal and bridging carbonyl ligands stack one on top of the other along ac ommon C 3 axis to form columnar structures bearing an overall doubly anionic charge.T he higher nuclearity oligomers (n = 5-8) can self-assemble into continuous chains,w ith the dimensionality of long-range ordering being highly dependent upon the identity of the charge-balancing cations. [12,13] As such, af urthered understanding of the electronic structure and reactivity profiles available to these clusters continues to be of importance. [12,13] As such, af urthered understanding of the electronic structure and reactivity profiles available to these clusters continues to be of importance.…”

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confidence: 99%

Monomeric Chini‐Type Triplatinum Clusters Featuring Dianionic and Radical‐Anionic π*‐Systems

2016

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Owing to their unique topologies and abilities to selfassemble into av ariety of extended and aggregated structures, the binary platinum carbonyl clusters [Pt 3 (CO) 6 ] n 2À ("Chini clusters") continue to draw significant interest. Herein, we report the isolation and structural characterization of the trinuclear electron-transfer series [Pt 3 (m-CO) 3 (CNAr Dipp2 ) 3 ] nÀ (n = 0, 1, 2), which represents au nique set of monomeric Pt 3 clusters supported by p-acidic ligands.S pectroscopic,c omputational, and synthetic investigations demonstrate that the highest-occupied molecular orbitals of the mono-and dianionic clusters consist of acombined p*-framework of the CO and CNAr Dipp2 ligands,w ith negligible Pt character.A ccordingly,t his study provides precedent for an ensemble of carbonyl and isocyanide ligands to function in ar edox noninnocent manner.

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confidence: 99%

Monomeric Chini‐Type Triplatinum Clusters Featuring Dianionic and Radical‐Anionic π*‐Systems

2016

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“…3c), suggests that the decay of I d in time is not due to degradation of the material during the experiment. Here we used H 2 Pc as representative material; however our approach is general and can be extended to other liquid crystals and more in general to other classes of organic materials such as molecular [43,44] or polymeric [45,46] semiconductors.…”

Section: Discussionmentioning

confidence: 99%

Doping and photo-induced current in discotic liquid crystals thin films: Long-time and temperature effects

Calò¹,

Stoliar²,

Cavallini³

et al. 2011

Organic Electronics

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. b s t r a c tHere we address the problem of time and temperature instability of the electrical current related to parasitic doping effects in discotic liquid crystals (DLCs). We investigated the electrical transport in thin films of a phthalocyanine-based DLC in-dark and upon laser irradiation during long thermal cycles. Measuring the electrical transport between two electrodes we observed that in-dark the current is mostly due to doping levels while, upon laser irradiation, the photocurrent reflects the diffusion length of the photogenerated charge carriers and it is limited by the coherence length of a column. We prove here that the two contributions are completely independent. Our result experimentally supports the theoretical studies performed at the molecular level on discotic liquid crystals.

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“…[30,31] The same group has recently fabricated micro-and nanoengineered organic field-effect transistors from solutionprocessable materials by additive soft lithography. [32] Moreover, curved substrates can also be patterned by mCP using PDMS stamps thanks to its flexibility. [33] PDMS stamps with micrometer-size features are typically fabricated by replica molding (REM) against master patterns which are generated by photolithography.…”

Section: Introductionmentioning

confidence: 99%

A Simple Method for Fabricating Patterned Curvilinear Microstructures in Poly(dimethylsiloxane) by Selective Wetting

Tang

2013

ChemPhysChem

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The fabrication of patterned microstructures in poly(dimethylsiloxane) (PDMS) is a prerequisite for soft lithography. Herein, curvilinear surface relief microstructures in PDMS are fabricated through a simple three-stage approach combining microcontact printing (μCP), selective surface wetting/dewetting and replica molding (REM). First, using an original PDMS stamp (first-generation stamp) with linear relief features, a chemical pattern on gold substrate is generated by μCP using hexadecanethiol (HDT) as an ink. Then, by a dip-coating process, an ordered polyethylene glycol (PEG) polymer-dot array forms on the HDT-patterned gold substrate. Finally, based on a REM process, the PEG-dot array on gold substrate is used to fabricate a second-generation PDMS stamp with microcavity array, and the second-generation PDMS stamp is used to generate third-generation PDMS stamp with microbump array. These fabricated new-generation stamps are utilized in μCP and in micromolding in capillaries (MIMIC), allowing the generation of surface micropatterns which cannot be obtained using the original PDMS stamp. The method will be useful in producing new-generation PDMS stamps, especially for those who want to use soft lithography in their studies but have no access to the microfabrication facilities.

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Towards All‐Organic Field‐Effect Transistors by Additive Soft Lithography

Abstract: N/

Cited by 72 publications

References 49 publications

Monomeric Chini‐Type Triplatinum Clusters Featuring Dianionic and Radical‐Anionic π*‐Systems

Monomeric Chini‐Type Triplatinum Clusters Featuring Dianionic and Radical‐Anionic π*‐Systems

Doping and photo-induced current in discotic liquid crystals thin films: Long-time and temperature effects

A Simple Method for Fabricating Patterned Curvilinear Microstructures in Poly(dimethylsiloxane) by Selective Wetting

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