Plasmon-enhanced photocurrent generation from click-chemically modified graphene.
The visible-light response of Au nanoparticles (AuNPs) assembled on rGO through different molecular bridges was investigated by transient photocurrent generation. We prepared rGO with two self-assembled monolayers (SAMs), one linear and the other with aromatic triazoles through a click cycloaddition reaction. A fivefold photocurrent enhancement was observed for triazole linkers over the aminopropyltrimethoxysilane (APTMS) linker. Cyclic voltammetry (CV) and impedance measurements also suggest fast electron transfer on account of the low resistance offered by the click-modified rGO surface whereby introduction of triazoles offers the efficient bridge between the donor AuNPs and acceptor rGO.
Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune-411008, MH, India, Fax: (+91) 2025902636; Academy of Scientific and Innovative Research (AcSIR), AnusandhanBhawan, 2 Rafi Marg, New Delhi-110001 (India).
Sandeep G
SG
Yenchalwar
Rami
R
Reddy Devarapalli
Ashvini B
AB
Deshmukh
Manjusha V
MV
Shelke
gold; graphene; nanoparticles; photophysics; surface plasmon resonance