Optical and Sensing Properties of 1-Pyrenecarboxylic Acid-Functionalized Graphene Films Laminated on Polydimethylsiloxane Membranes

Abstract

We present fabrication and characterization of macroscopic thin films of graphene flakes, which are functionalized with 1-pyrenecarboxylic acid (PCA) and are laminated onto flexible and transparent polydimethylsiloxane (PDMS) membranes. The noncovalently (π-stacked) functionalization of PCA allows us to obtain a number of unique optical and molecular sensing properties that are absent in pristine graphene films, without sacrificing the conducting nature of graphene. The flexible PCA-graphene-PDMS hybrid structure can block 70-95% of ultraviolet (UV) light, while allowing 65% or higher transmittance in the visible region, rendering them potentially useful for a number of flexible UV absorbing/filtering applications. In addition, the electrical resistance of these structures is found to be sensitive to the illumination of visible light, atmospheric pressure change, and the presence of different types of molecular analytes. Owing to their multifunctionality, these hybrid structures have immense potential for the development of versatile, low-cost, flexible, and portable electronic and optoelectronic devices for diverse applications.

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

“…For example, An and co-workers [ 82 ] covered graphene fl akes obtained by drying a graphene suspension, with 1-pyrenecarboxylic acid (PCA), a pericondensed aromatic molecule which absorbs light around 340 nm, and forms non covalent π -π binding sites with graphene layers. The authors were able to make a fl exible photosensitive device by embedding the graphene/PCA ensemble in a silicone matrix.…”

3D stereolithography printing of graphene oxide reinforced complex architectures

“…On the other hand, graphene, a single layer of sp 2 hybridized carbon atoms forming a 2D hexagonal lattice, has a breaking strength 200 times larger than that of steel and a Young's modulus of 1 TPa [6][7][8]. It has been applied to improve properties of polymers, including mechanical properties [1,[9][10][11][12][13][14][15][16][17], electrical properties [18][19][20], thermal properties [1,21,22], optical properties [23,24], electromagnetic interference shielding [25,26] and barrier properties [27][28][29]. The design and behavior of polymer nanocomposites mainly depend on the aspect ratio of nanofillers, percolation threshold and interfacial property of nanofiller and matrix [7].…”

Direct Ink Writing Technology (3D Printing) of Graphene-Based Ceramic Nanocomposites: A Review

“…In this review, only the AM techniques that are more typical for the production of graphene-based composites, in particular SLA, IJP, FDM, and DIW, will be analyzed. Some of these methods are based on the use of polymers; and the introduction of graphene-based material into them allows the obtaining of polymer nanocomposites with improved properties, for example, barrier properties [185,220,221], optical properties [222,223], thermal properties [224][225][226], electrical properties [227][228][229] and mechanical properties [224,[230][231][232].…”