scholarly journals Improved Surface-Enhanced Raman Scattering Properties of ZrO2 Nanoparticles by Zn Doping

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 983 ◽  
Author(s):  
Peng Ji ◽  
Zhu Mao ◽  
Zhe Wang ◽  
Xiangxin Xue ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Zro2 Nanoparticles ◽  
Zn Doping ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this study, ZrO2 and Zn–ZrO2 nanoparticles (NPs) with a series of Zn ion doping amounts were synthesized by the sol-gel process and utilized as substrates for surface-enhanced Raman scattering (SERS). After absorbing the probing molecule 4–mercaptobenzoic acid, the SERS signal intensities of Zn–ZrO2 NPs were all greater than that of the pure ZrO2. The 1% Zn doping concentration ZrO2 NPs exhibited the highest SERS enhancement, with an enhancement factor (EF) value of up to 104. X-ray diffraction, X-ray photoelectron spectroscopy, Ultraviolet (UV) photoelectron spectrometer, UV–vis spectroscopy, Transmission Electron Microscope (TEM), and Raman spectroscopy were used to characterize the properties of Zn–ZrO2 NPs and explore the mechanisms behind the SERS phenomenon. The charge transfer (CT) process is considered to be responsible for the SERS performance of 4–MBA adsorbed on Zn–ZrO2. The results of this study demonstrate that an appropriate doping ratio of Zn ions can promote the charge transfer process between ZrO2 NPs and probe molecules and significantly improve the SERS properties of ZrO2 substrates.

Charge-Transfer-Induced Surface-Enhanced Raman Scattering on Ag−TiO2 Nanocomposites

2009 ◽  
Vol 113 (36) ◽  
pp. 16226-16231 ◽  
Author(s):  
Libin Yang ◽  
Xin Jiang ◽  
Weidong Ruan ◽  
Jingxiu Yang ◽  
Bing Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Fabrication and Characterization of a Highly-Sensitive Surface-Enhanced Raman Scattering Nanosensor for Detecting Glucose in Urine

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 629 ◽  
Author(s):  
Yudong Lu ◽  
Ting Zhou ◽  
Ruiyun You ◽  
Yang Wu ◽  
Huiying Shen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Internal Standard ◽  
Surface Enhanced Raman Scattering ◽  
Quantitative Detection ◽  
Core Shell ◽  
Ag Nps ◽  
Vis Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Herein we utilized coordination interactions to prepare a novel core-shell plasmonic nanosensor for the detection of glucose. Specifically, Au nanoparticles (NPs) were strongly linked with Ag+ ions to form a sacrificial Ag shell by using 4-aminothiophenol (4-PATP) as a mediator, which served as an internal standard to decrease the influence of the surrounding on the detection. The resultant Au-PATP-Ag core-shell systems were characterized by UV-vis spectroscopy, transmission electron microscopy, and surface-enhanced Raman scattering (SERS) techniques. Experiments performed with R6G (rhodamine 6G) and CV (crystal violet) as Raman reporters demonstrated that the Au@Ag nanostructure amplified SERS signals obviously. Subsequently, the Au@Ag NPs were decorated with 4-mercaptophenylboronic acid (4-MPBA) to specifically recognize glucose by esterification, and a detection limit as low as 10−4 M was achieved. Notably, an enhanced linearity for the quantitative detection of glucose (R2 = 0.995) was obtained after the normalization of the spectral peaks using 4-PATP as the internal standard. Finally, the practical applicability of the developed sensing platform was demonstrated by the detection of glucose in urine with acceptable specificity.

Surface-enhanced Raman scattering on organic–inorganic hybrid perovskites

2018 ◽  
Vol 54 (17) ◽  
pp. 2134-2137 ◽  
Author(s):  
Xiaoyue Su ◽  
Hao Ma ◽  
He Wang ◽  
Xueliang Li ◽  
Xiao Xia Han ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Inorganic Hybrid ◽  
Enhancement Mechanism ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
First Time

For the first time SERS on organic–inorganic hybrid perovskites is explored. The enhancement mechanism is discussed according to charge transfer.

Metal–semiconductor heterostructures for surface-enhanced Raman scattering: synergistic contribution of plasmons and charge transfer

2021 ◽  
Author(s):  
Yawen Liu ◽  
Hao Ma ◽  
Xiao Xia Han ◽  
Bing Zhao
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Building Blocks ◽  
Surface Enhanced Raman Scattering ◽  
Semiconductor Heterostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

SERS on metal–semiconductor heterostructures including their building blocks, enhancement mechanisms and applications was reviewed. The synergistic contribution of plasmons and charge transfer is highlighted.

Mesoporous semiconducting TiO2 with rich active sites as a remarkable substrate for surface-enhanced Raman scattering

2017 ◽  
Vol 19 (28) ◽  
pp. 18731-18738 ◽  
Author(s):  
Libin Yang ◽  
Di Yin ◽  
Yu Shen ◽  
Ming Yang ◽  
Xiuling Li ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Active Sites ◽  
Surface Enhanced Raman Scattering ◽  
Transfer Mechanism ◽  
Charge Transfer Mechanism ◽  
Highly Active ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Mesoporous TiO2 with highly active sites was used as an effective and recyclable substrate for SERS contributed by the charge-transfer mechanism.

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