Light-enhanced liquid-phase exfoliation and current photoswitching in graphene-azobenzene composites

被引：99

作者：

Doebbelin, Markus ^{[1
,2
,3
]}

Ciesielski, Artur ^{[1
,2
,3
]}

Haar, Sebastien ^{[1
,2
,3
]}

Osella, Silvio ^{[4
]}

Bruna, Matteo ^{[5
]}

Minoia, Andrea ^{[4
]}

Grisanti, Luca ^{[4
]}

Mosciatti, Thomas ^{[1
,2
,3
]}

Richard, Fanny ^{[1
,2
,3
]}

Prasetyanto, Eko Adi ^{[2
,3
,6
]}

De Cola, Luisa ^{[2
,3
,6
]}

Palermo, Vincenzo ^{[7
]}

Mazzaro, Raffaello ^{[8
,9
]}

Morandi, Vittorio ^{[8
]}

Lazzaroni, Roberto ^{[4
]}

Ferrari, Andrea C. ^{[5
]}

Beljonne, David ^{[4
]}

Samori, Paolo ^{[1
,2
,3
]}

机构：

[1] Univ Strasbourg, ISIS, Nanochem Lab, 8 Allee Gaspard Monge, F-67000 Strasbourg, France

[2] Univ Strasbourg, IcFRC, 8 Allee Gaspard Monge, F-67000 Strasbourg, France

[3] CNRS, 8 Allee Gaspard Monge, F-67000 Strasbourg, France

[4] Univ Mons, Lab Chem Novel Mat, Pl Parc 20, B-7000 Mons, Belgium

[5] Univ Cambridge, Cambridge Graphene Ctr, 9 JJ Thomson Ave, Cambridge CB3 OFA, England

[6] Univ Strasbourg, ISIS, Lab Supramol Biomat & Chem, 8 Allee Gaspard Monge, F-67000 Strasbourg, France

[7] CNR, ISOF, Via Gobetti 101, I-40129 Bologna, Italy

[8] CNR, IMM, Sez Bologna, Via Gobetti 101, I-40129 Bologna, Italy

[9] Univ Bologna, Dipartimento Chim G Ciamician, Via Selmi 2, I-40126 Bologna, Italy

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

英国工程与自然科学研究理事会;

关键词：

RAMAN-SPECTROSCOPY; GRAPHITE; ELECTRONICS; DYNAMICS; SYSTEMS; SCATTERING; CRYSTALS; PLATFORM; HYBRID; CARBON;

D O I：

10.1038/ncomms11090

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Multifunctional materials can be engineered by combining multiple chemical components, each conferring a well-defined function to the ensemble. Graphene is at the centre of an ever-growing research effort due to its combination of unique properties. Here we show that the large conformational change associated with the trans-cis photochemical isomerization of alkyl-substituted azobenzenes can be used to improve the efficiency of liquid-phase exfoliation of graphite, with the photochromic molecules acting as dispersion-stabilizing agents. We also demonstrate reversible photo-modulated current in two-terminal devices based on graphene-azobenzene composites. We assign this tuneable electrical characteristics to the intercalation of the azobenzene between adjacent graphene layers and the resulting increase in the interlayer distance on (photo) switching from the linear trans-form to the bulky cis-form of the photochromes. These findings pave the way to the development of new optically controlled memories for light-assisted programming and high-sensitive photosensors.

引用

页数：10

共 54 条

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