TY - JOUR
T1 - Unveiling the growth mechanism of SiO 2 /Ag hybrid nanospheres and using for Surface Enhanced Raman Scattering detection
AU - Huang, Jie
AU - Zhou, Yong feng
AU - Xu, Jian
AU - Liang, Pei
AU - Liu, Zu gang
AU - Wang, Jie
AU - Zhang, De
AU - Dong, Qian ming
AU - Shen, Wei min
AU - Zhuang, Song lin
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Sensitive substrate is the key factor, which may affect the enhancement effect of the SERS detection. SiO 2 /Ag hybrid nanospheres were synthesized by using (3-Aminopropyl) trimethoxysilane (APTES) modified SiO 2 nanospheres and [Ag(NH 3 ) 2 ] + ions, which would be used as very sensitive and homogeneous surface enhanced Raman scattering (SERS) substrates. Our results show that the –NH 2 groups were grafted on the surface of SiO 2 due to the modification of APTES, which promoted adsorption of Ag nanoparticles on the SiO 2 matrix. The effects of APTES on the micromorphology, chemical structure, and SERS performance of SiO 2 /Ag hybrid nanospheres were investigated by the SEM, XRD, and SERS measurements. Results indicated that the Ag nanoparticles were crystalline and the diameter of AgNPs ranged from 50 to 100 nm. SERS measurement showed that the surface electromagnetic enhancement would increase with number of AgNPs on SiO 2 nanospheres surface, and the mechanism explained by the FDTD simulation. Furthermore, our results indicate the highly uniformity and reproducibility of these substrates with the relative standard deviation (RSD) of peak intensity was 7.74%. The SiO 2 /Ag nanospheres with had high sensitivity, uniformity and reproducibility should be potential SERS applications.
AB - Sensitive substrate is the key factor, which may affect the enhancement effect of the SERS detection. SiO 2 /Ag hybrid nanospheres were synthesized by using (3-Aminopropyl) trimethoxysilane (APTES) modified SiO 2 nanospheres and [Ag(NH 3 ) 2 ] + ions, which would be used as very sensitive and homogeneous surface enhanced Raman scattering (SERS) substrates. Our results show that the –NH 2 groups were grafted on the surface of SiO 2 due to the modification of APTES, which promoted adsorption of Ag nanoparticles on the SiO 2 matrix. The effects of APTES on the micromorphology, chemical structure, and SERS performance of SiO 2 /Ag hybrid nanospheres were investigated by the SEM, XRD, and SERS measurements. Results indicated that the Ag nanoparticles were crystalline and the diameter of AgNPs ranged from 50 to 100 nm. SERS measurement showed that the surface electromagnetic enhancement would increase with number of AgNPs on SiO 2 nanospheres surface, and the mechanism explained by the FDTD simulation. Furthermore, our results indicate the highly uniformity and reproducibility of these substrates with the relative standard deviation (RSD) of peak intensity was 7.74%. The SiO 2 /Ag nanospheres with had high sensitivity, uniformity and reproducibility should be potential SERS applications.
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U2 - 10.1016/j.apsusc.2018.08.220
DO - 10.1016/j.apsusc.2018.08.220
M3 - Article
AN - SCOPUS:85052327698
SN - 0169-4332
VL - 463
SP - 115
EP - 120
JO - Applied Surface Science
JF - Applied Surface Science
ER -