TY - JOUR
T1 - Sensitive Detection of Polycyclic Aromatic Molecules
T2 - Surface Enhanced Raman Scattering via π-π Stacking
AU - Yuan, Yufeng
AU - Yu, Xiantong
AU - Zhang, Qiang
AU - Chang, Mengfang
AU - Li, Lei
AU - Yang, Taiqun
AU - Chen, Yuting
AU - Pan, Haifeng
AU - Zhang, Sanjun
AU - Li, Li
AU - Xu, Jianhua
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/5/3
Y1 - 2016/5/3
N2 - We report silver nanoparticles (Ag NPs) with high stability, sensitivity, and no surface enhanced Raman scattering (SERS) background. The Ag NPs were synthesized via a one-step process with polysodium styrenesulfonate (PSSS) templates, and they could efficiently adsorb polycyclic aromatic molecules via π-π stacking. The adsorption mechanisms and applicability were systematically studied by experimental measurements and theoretical simulations. When the polycyclic aromatic analytes were adsorbed on the PSSS-templated Ag NPs, the vibrations of π-π stacking-bound moieties were attenuated, yet those of the other unbound aromatic moieties increased. Most importantly, when the analytes had more than two π-π stacking binding sites, the PSSS-templated Ag NPs could trap the analytes by focusing through the optical force induced or via the simultaneously formed analyte-Ag NPs aggregates. This afforded high SERS intensity and very low detection limits.
AB - We report silver nanoparticles (Ag NPs) with high stability, sensitivity, and no surface enhanced Raman scattering (SERS) background. The Ag NPs were synthesized via a one-step process with polysodium styrenesulfonate (PSSS) templates, and they could efficiently adsorb polycyclic aromatic molecules via π-π stacking. The adsorption mechanisms and applicability were systematically studied by experimental measurements and theoretical simulations. When the polycyclic aromatic analytes were adsorbed on the PSSS-templated Ag NPs, the vibrations of π-π stacking-bound moieties were attenuated, yet those of the other unbound aromatic moieties increased. Most importantly, when the analytes had more than two π-π stacking binding sites, the PSSS-templated Ag NPs could trap the analytes by focusing through the optical force induced or via the simultaneously formed analyte-Ag NPs aggregates. This afforded high SERS intensity and very low detection limits.
UR - https://www.scopus.com/pages/publications/84966293241
U2 - 10.1021/acs.analchem.5b04487
DO - 10.1021/acs.analchem.5b04487
M3 - 文章
AN - SCOPUS:84966293241
SN - 0003-2700
VL - 88
SP - 4328
EP - 4335
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 8
ER -