Selective n-Type Doping of Graphene by Photo-patterned Gold Nanoparticles

Abstract

Selective n-type doping of graphene is developed by utilizing patternable gold nanoparticles functionalized with photoreactive cinnamate moieties. The gold nanoparticles can be regularly patterned on the graphene by UV-induced cross-linking of cinnamate, which provides a convenient method to control the optical and electrical properties of graphene site-specifically. The strong n-type doping of graphene covered with the patterned gold nanoparticles was confirmed by Raman, X-ray photoelectron spectroscopy, and electron transport measurements. We believe that our method would find numerous applications in the area of graphene-based optoelectronics including light-emitting devices, solar cells, and optical sensors.

Environmental applications using graphene composites: water remediation and gas adsorption

“…The discovery of graphene is rightly regarded as a milestone in the world of materials science, as can be seen from the worldwide attention the material has received in the elds of electronics/spintronics, 252,253 organo electronics, [254][255][256][257] photonics, 258 supercapacitors, 259,260 and biosensing [261][262][263][264] to name a few. Research shows that single layer, multilayer and functionalized graphene sheets, as well as other graphene-based architectures offer a wide range of benets for different applications.…”

Surface on Surface. Survey of the Monolayer Gold–Graphene Interaction from Au12 and PAH via Relativistic DFT Calculations

“…The evaluation of the gold-graphene interaction given by different hydrogenated graphene models, accounted by C 6 H 6 , C 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60…”

“…20,21 --3 --Interestingly, gold/graphene, among other noble metals-based composites, 22 exhibits remarkable properties for application as new generation of electrochemical active devices and biosensors for enzyme detection. 23 The possibility of graphene n-type doping has been also explored by functionalized gold particles with promising applications in graphene-based electronic devices, 24 denoting the great potential of gold/graphene composites. Another interesting advantage of the inclusion of gold aggregates into graphene, it is the enhanced binding energy observed for defects leading to the growth of with larger sizes, being a clever strategy for characterize via scanning tunneling microscopy (STM) among other techniques.…”

“…Our model considers the Au 12 cluster adsorbed on several models of graphene sheets, given by polycyclic aromatic hydrocarbon (PAH) molecules of increasing size, 41-45 going from benzene (C 6 H 6 ), coronene (C 24 …”

Controlled Positioning of Nanoparticles on Graphene by Noninvasive AFM Lithography

“…In addition, the optical and electrical properties of graphene can also be tailored by the site-specific patterning of Au NPs decorated with cinnamate moieties covalently cross-linked by UV irradiation. 21 Although these studies were successful on structuring materials on graphene with control on feature thickness and size, the ability to accurately control the positioning of these structures on preselected sites of a graphene surface by a mild method still remains a challenge. If successful, this will open new perspectives mainly for device and sensing applications, where objects need to be placed with high precision onto well-defined sensing regions of the device.…”