scholarly journals Au@Ag core–shell nanoparticles with a hidden internal reference promoted quantitative solid phase microextraction-surface enhanced Raman spectroscopy detection

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23866-23874 ◽  
Author(s):  
Lei Sun ◽  
Min Zhang ◽  
Vinothkumar Natarajan ◽  
Xiaofei Yu ◽  
Xiaoli Zhang ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Surface Enhanced Raman Spectroscopy ◽  
Structural Representation ◽  
Internal Reference ◽  
Shell Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Core Shell Nanoparticles

Structural representation of the SPME-SERS fiber with an internal reference and the SERS detection.

Silver nanoparticle aggregates on metal fibers for solid phase microextraction–surface enhanced Raman spectroscopy detection of polycyclic aromatic hydrocarbons

The Analyst ◽  
2015 ◽  
Vol 140 (13) ◽  
pp. 4668-4675 ◽  
Author(s):  
Cuicui Liu ◽  
Xiaoli Zhang ◽  
Limei Li ◽  
Jingcheng Cui ◽  
Yu-e Shi ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Nanoparticle Aggregates ◽  
Sers Detection ◽  
Polycyclic Aromatic

Silver–copper fibers loaded with silver nanoparticles are used for SPME–SERS detection of polycyclic aromatic hydrocarbons, which can be further confirmed by GC-MS.

scholarly journals Bimetallic Core–Shell Nanoparticles of Gold and Silver via Bioinspired Polydopamine Layer as Surface-Enhanced Raman Spectroscopy (SERS) Platform

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 688 ◽  
Author(s):  
Asli Yilmaz ◽  
Mehmet Yilmaz
Keyword(s):  
Raman Spectroscopy ◽  
Low Cost ◽  
Silver Ions ◽  
Surface Enhanced Raman Spectroscopy ◽  
Core Shell ◽  
Silver Deposition ◽  
Shell Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Core Shell Nanoparticles

Despite numerous attempts to fabricate the core–shell nanoparticles, novel, simple, and low-cost approaches are still required to produce these efficient nanosystems. In this study, we propose the synthesis of bimetallic core–shell nanoparticles of gold (AuNP) and silver (AgNP) nanostructures via a bioinspired polydopamine (PDOP) layer and their employment as a surface-enhanced Raman spectroscopy (SERS) platform. Herein, the PDOP layer was used as an interface between nanostructures as well as stabilizing and reducing agents for the deposition of silver ions onto the AuNPs. UV-vis absorption spectra and electron microscope images confirmed the deposition of the silver ions and the formation of core–shell nanoparticles. SERS activity tests indicated that both the PDOP thickness and silver deposition time are the dominant parameters that determine the SERS performances of the proposed core–shell system. In comparison to bare AuNPs, more than three times higher SERS signal intensity was obtained with an enhancement factor of 3.5 × 105.

Electrostatic-driven solid phase microextraction coupled with surface enhanced Raman spectroscopy for rapid analysis of pentachlorophenol

2017 ◽  
Vol 9 (3) ◽  
pp. 459-464 ◽  
Author(s):  
Weiwei Bian ◽  
Sha Zhu ◽  
Mingying Qi ◽  
Lanlan Xiao ◽  
Zhen Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Charge ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Surface Enhanced Raman Spectroscopy ◽  
Rapid Analysis ◽  
Positive Surface Charge ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Ag Substrate

Rapid analysis of pentachlorophenol by electrostatic-driven SPME–SERS on a nanoporous Ag substrate with positive surface charge.

Combining Headspace Solid-Phase Microextraction and Surface-Enhanced Raman Spectroscopy To Detect the Pesticide Fonofos in Apple Juice

2018 ◽  
Vol 81 (7) ◽  
pp. 1087-1092 ◽  
Author(s):  
HAOXIN CHEN ◽  
CHUNRONG WANG ◽  
ZHIYUN ZHANG ◽  
LILI HE
Keyword(s):  
Raman Spectroscopy ◽  
Solid Phase Microextraction ◽  
Apple Juice ◽  
Solid Phase ◽  
Steel Wire ◽  
Surface Enhanced Raman Spectroscopy ◽  
Headspace Solid Phase Microextraction ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Headspace Spme

ABSTRACT We developed an innovative approach that couples headspace solid-phase microextraction (SPME) with surface-enhanced Raman spectroscopy (SERS) to detect a volatile pesticide (i.e., fonofos) in a liquid complex matrix (i.e., apple juice). A gold nanoparticles–coated fiber was fabricated by reducing gold(III) on a chemically etched stainless steel wire to extract pesticide, using SPME. The fabricated fibers were then tested by a headspace-SPME method and a dip-SPME method, followed by SERS detection of fonofos in water and apple juice samples. Using the headspace-SPME method, we can detect as low as 5 ppb of fonofos in water and apple juice, compared with the dip-SPME method, which cannot detect lower than 10 ppb in water and 50 ppb in apple juice. This study demonstrated the potential capability of the headspace-SPME-SERS method for rapid (within 30 min) and sensitive detection of volatile and vaporizable compounds in complex matrices. The developed method could be a potential alternative approach to the gas chromatography method. Future work is needed to optimize the fiber by minimizing signal variation, and it should be tested in a variety of targeted compounds and matrices.

β-Cyclodextrin coated SiO2@Au@Ag core–shell nanoparticles for SERS detection of PCBs

2015 ◽  
Vol 17 (33) ◽  
pp. 21149-21157 ◽  
Author(s):  
Yilin Lu ◽  
Guohua Yao ◽  
Kexi Sun ◽  
Qing Huang
Keyword(s):  
Ag Nanoparticles ◽  
Core Shell ◽  
Sers Substrate ◽  
Shell Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
New Type ◽  
Enhanced Raman Scattering ◽  
Core Shell Nanoparticles

A new type of surface-enhanced Raman scattering (SERS) substrate consisting of β-cyclodextrin (β-CD) coated SiO2@Au@Ag nanoparticles (SiO2@Au@Ag@CD NPs) has been achieved.

A surface-enhanced Raman scattering-based probe method for detecting chromogranin A in adrenal tumors

Nanomedicine ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 397-407
Author(s):  
Xiaoyu Cui ◽  
Dayu Hu ◽  
Chengyuan Wang ◽  
Shuo Chen ◽  
Zeyin Zhao ◽  
...  
Keyword(s):  
Protein Detection ◽  
Surface Enhanced Raman Spectroscopy ◽  
Probe Method ◽  
Adrenal Tumors ◽  
Shell Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Novel Strategy ◽  
Core Shell Nanoparticles

Aim: We aim to demonstrate that a surface-enhanced Raman spectroscopy (SERS) probe can be effectively used for protein detection in adrenal tumors. Materials & methods: The SERS probe method, which uses Au@Ag core-shell nanoparticles conjugated with a CgA antibody and a SERS reporter, was applied to detect CgA in adrenal tumors. Results: Our data reveal that the results of the CgA-SERS probe method were almost identical to those of western blot and superior to those of traditional immunohistochemistry. Conclusion: This study offers a novel strategy to detect CgA in adrenal tumors and provides more reliable protein test results than traditional immunohistochemistry analysis for adrenal pathologists, meaning that it might be a better clinical reference for the diagnosis of pheochromocytoma.

Sign in / Sign up

Export Citation Format

Share Document