Open AccessSurface‐enhanced Raman spectroscopy for tellurium detection by AgNPs‐loaded 3D porous graphene hydrogel
Author(s) -
Zhou Xiaojiao,
Gao Jianwei,
Huang Hua,
Wu Qingsheng,
Ji Xiang
Publication year - 2017
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0297
Subject(s) - graphene , raman spectroscopy , materials science , tellurium , raman scattering , silver nanoparticle , detection limit , surface enhanced raman spectroscopy , substrate (aquarium) , nanoparticle , porosity , spectroscopy , chemical engineering , nanotechnology , analytical chemistry (journal) , chemistry , optics , composite material , chromatography , oceanography , engineering , geology , metallurgy , quantum mechanics , physics
A three‐dimensional (3D) graphene hydrogel covered by uniform silver nanoparticles as an effective substrate for surface‐enhanced Raman scattering application was fabricated by facile ethylenediamine‐induced self‐assembly method. The anchor of silver nanoparticles endows the enhanced Raman spectroscopy with the sensitivity and multiplex requirements for the tellurium quick detection using the robust graphene‐based monoliths. The porous structure offers essential channels and space for Te(IV) access. After exposure to Te(IV), the distinguished peak of Te‐O at 584.9 cm −1 , which was enhanced significantly and kept constant over a wide range of pH, was selected as the indicative of Te(IV) level. At the optimal pH, the concentration dependent surface‐enhanced Raman spectroscopy shows that the detection limit was as low as 100 nM.