scholarly journals ZnO Tips Dotted with Au Nanoparticles—Advanced SERS Determination of Trace Nicotine

Biosensors ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 465
Author(s):  
Jiaying Cao ◽  
Yan Zhai ◽  
Wanxin Tang ◽  
Xiaoyu Guo ◽  
Ying Wen ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
High Sensitivity ◽  
Lung Damage ◽  
Sers Substrate ◽  
Detection Range ◽  
Reliable Determination ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Long-term exposure to nicotine causes a variety of human diseases, such as lung damage/adenocarcinoma, nausea and vomiting, headache, incontinence and heart failure. In this work, as a surface-enhanced Raman scattering (SERS) substrate, zinc oxide (ZnO) tips decorated with gold nanoparticles (AuNPs) are fabricated and designated as ZnO/Au. Taking advantage of the synergistic effect of a ZnO semiconductor with morphology of tips and AuNPs, the ZnO/Au-based SERS assay for nicotine demonstrates high sensitivity and the limit of detection 8.9 × 10−12 mol/L is reached, as well as the corresponding linear dynamic detection range of 10−10–10−6 mol/L. Additionally, the signal reproducibility offered by the SERS substrate could realize the reliable determination of trace nicotine in saliva.

An in situ approach for facile fabrication of robust and scalable SERS substrates

Nanoscale ◽  
2014 ◽  
Vol 6 (13) ◽  
pp. 7232-7236 ◽  
Author(s):  
Yi-Chung Wang ◽  
Joseph S. DuChene ◽  
Fengwei Huo ◽  
Wei David Wei
Keyword(s):  
High Sensitivity ◽  
Sers Substrate ◽  
Biological Detection ◽  
Sers Substrates ◽  
Widespread Implementation ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Facile Fabrication ◽  
Enhanced Raman Scattering

The widespread implementation of surface enhanced Raman scattering (SERS) techniques for chemical and biological detection requires an inexpensive, yet robust SERS substrate with high sensitivity and reproducibility.

scholarly journals Trace Cd2+ Ions Detection on the Flower-Like Ag@CuO Substrate

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1664
Author(s):  
Mingming Cheng ◽  
Chenyan Li ◽  
Weijun Li ◽  
Yingkai Liu
Keyword(s):  
Drinking Water ◽  
Environmental Protection Agency ◽  
Limit Of Detection ◽  
World Health ◽  
Sers Substrate ◽  
Facile Hydrothermal Method ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Health Organization

CuO flower-like material (FM) was prepared via the facile hydrothermal method, and Ag nanoparticles were deposited on the CuO FM to obtain Ag@CuO composite. Rhodamine 6G (R6G) was used as the probe molecule on Ag@CuO FM substrate to study surface enhanced Raman scattering (SERS). It is discovered that it exhibited an excellent SERS performance with limit of detection of 3.58 × 10−16 M and enhancement factor (EF) of 3.99 × 1010. More importantly, we used it as a SERS substrate to detect cadmium ions and found that its limit of detection (LOD) reaches up to 2.6 × 10−8 M, which is lower than the highest allowable Cd2+ concentration in drinking water set by the World Health Organization (WHO) and Environmental Protection Agency (EPA). Therefore, the proposed composite can be applicable to the detection of Cd2+ in drinking water and in soil.

A self-referenced method for determination of patulin by surface-enhanced Raman scattering using gold nanobipyramids as the substrate

2019 ◽  
Vol 11 (40) ◽  
pp. 5142-5149 ◽  
Author(s):  
Yan Kang ◽  
Hai-Xin Gu ◽  
Xin Zhang
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Gold Nanobipyramids

A 4-MBA probe was employed to detect patulin using gold nanobipyramids as the SERS substrate.

Determination of Nicotine by Surface-Enhanced Raman Scattering (SERS)

1994 ◽  
Vol 48 (11) ◽  
pp. 1423-1427 ◽  
Author(s):  
Tye E. Barber ◽  
Matthew S. List ◽  
John W. Haas ◽  
Eric A. Wachter
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silver Electrode ◽  
Sers Substrate ◽  
Reduction Cycle ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Total Analysis ◽  
Enhanced Raman Scattering

The analytical application of surface-enhanced Raman spectroscopy (SERS) to the determination of nicotine is demonstrated. A simple spectroelectrochemical method using a copper or silver electrode as the SERS substrate has been developed, consisting of three steps: polishing a working electrode to a mirror finish; roughening the electrode in an electrolyte solution; and, finally, depositing the nicotine analyte onto the roughened electrode after immersion in a sample solution. During the reduction cycle, a large enhancement in nicotine Raman scattering is observed at the electrode surface. The intensity of the SERS signal on a silver electrode is linear with concentration from 10 to 900 ppb, with an estimated detection limit of 7 ppb. The total analysis time per sample is approximately five minutes. This procedure has been used to analyze the extract from a cigarette side-stream smoke sample (environmental tobacco smoke); the SERS results agree well with those of conventional gas chromatographic analysis.

scholarly journals Noble Metallic Pyramidal Substrate for Surface-Enhanced Raman Scattering Detection of Plasmid DNA Based on Template Stripping Method

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 923
Author(s):  
Wenjie Wu ◽  
Rui Li ◽  
Maodu Chen ◽  
Jiankang Li ◽  
Weishen Zhan ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Noble Metal ◽  
Plasmid Dna ◽  
Metal Film ◽  
Limit Of Detection ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this paper, a new method for manufacturing flexible and repeatable sensors made of silicon solar cells is reported. The method involves depositing the noble metal film directly onto the Si template and stripping out the substrate with a pyramid morphology by using an adhesive polymer. In order to evaluate the enhancement ability of the substrate, Rhodamine 6G (R6G) were used as surface-enhanced Raman scattering (SERS) probe molecules, and the results showed a high sensitivity and stability. The limit of detection was down to 10−12 M for R6G. The finite-difference time domain (FDTD) was used to reflect the distribution of the electromagnetic field, and the electric field was greatly enhanced on the surface of the inverted pyramidal substrate, especially in pits. The mechanism of Raman enhancement of two types of pyramidal SERS substrate, before and after stripping of the noble metal film, is discussed. By detecting low concentrations of plasmid DNA, the identification of seven characteristic peaks was successfully realized using a noble metallic pyramidal substrate.

scholarly journals SERS-Based Aptasensor for Rapid Quantitative Detection of SARS-CoV-2

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1394
Author(s):  
Elena Zavyalova ◽  
Oganes Ambartsumyan ◽  
Gleb Zhdanov ◽  
Dmitry Gribanyov ◽  
Vladimir Gushchin ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Virus Detection ◽  
High Sensitivity ◽  
Quantitative Detection ◽  
Colloidal Solutions ◽  
New Techniques ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

During the COVID-19 pandemic, the development of sensitive and rapid techniques for detection of viruses have become vital. Surface-enhanced Raman scattering (SERS) is an appropriate tool for new techniques due to its high sensitivity. SERS materials modified with short-structured oligonucleotides (DNA aptamers) provide specificity for SERS biosensors. Existing SERS-based aptasensors for rapid virus detection are either inapplicable for quantitative determination or have sophisticated and expensive construction and implementation. In this paper, we provide a SERS-aptasensor based on colloidal solutions which combines rapidity and specificity in quantitative determination of SARS-CoV-2 virus, discriminating it from the other respiratory viruses.

scholarly journals Rapid Determination of the ‘Legal Highs’ 4-MMC and 4-MEC by Spectroelectrochemistry: Simultaneous Cyclic Voltammetry and In Situ Surface-Enhanced Raman Spectroscopy

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 295
Author(s):  
Jerson González-Hernández ◽  
Colby Edward Ott ◽  
María Julia Arcos-Martínez ◽  
Álvaro Colina ◽  
Aránzazu Heras ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Voltammetry ◽  
Surface Enhanced Raman Spectroscopy ◽  
Designer Drugs ◽  
Sers Substrate ◽  
Legal Highs ◽  
Reliable Determination ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The synthetic cathinones mephedrone (4-MMC) and 4-methylethcathinone (4-MEC) are two designer drugs that represent the rise and fall effect of this drug category within the stimulants market and are still available in several countries around the world. As a result, the qualitative and quantitative determination of ‘legal highs’, and their mixtures, are of great interest. This work explores for the first time the spectroelectrochemical response of these substances by coupling cyclic voltammetry (CV) with Raman spectroscopy in a portable instrument. It was found that the stimulants exhibit a voltammetric response on a gold screen-printed electrode while the surface is simultaneously electro-activated to achieve a periodic surface-enhanced Raman spectroscopy (SERS) substrate with high reproducibility. The proposed method enables a rapid and reliable determination in which both substances can be selectively analyzed through the oxidation waves of the molecules and the characteristic bands of the electrochemical SERS (EC-SERS) spectra. The feasibility and applicability of the method were assessed in simulated seized drug samples and spiked synthetic urine. This time-resolved spectroelectrochemical technique provides a cost-effective and user-friendly tool for onsite screening of synthetic stimulants in matrices with low concentration analytes for forensic applications.

Rapid Detection of Cypermethrin by Using Surface-Enhanced Raman Scattering Technique

2020 ◽  
Vol 853 ◽  
pp. 102-106
Author(s):  
Wipawanee Leung ◽  
Saksorn Limwichean ◽  
Noppadon Nuntawong ◽  
Pitak Eiamchai ◽  
Sukon Kalasung ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Rapid Detection ◽  
Limit Of Detection ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Silver Nanorods ◽  
Raman Spectrometer ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Cypermethrin is a toxic pesticide in the pyrethroid group. A Surface Enhanced Raman Scattering (SERS) based sensor has been developed to achieve simple pesticide sensing. In this work, rapid detection of cypermethrin by using the handheld Raman spectroscopy coupled with SERS substrate was demonstrated. SERS-active silver nanorods substrate was used to enhance Raman signals of test samples. The effect of exposure time and drop volume of sample was studied for cypermethrin measurement. The results found that the silver nanorods substrate can be used to measure cypermethrin in the range of 10-6 to 10-3 M with a handheld Raman spectrometer. Furthermore, the Raman signal of cypermethrin was confirmed by measuring solid cypermethrin with the standard Raman spectrometer. SERS substrate was competent to detect cypermethrin with a limit of detection (LOD) of 10-6 M.

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