Journal ArticleDOI
Sensitive Surface-Enhanced Raman Spectroscopy (SERS) Detection of Organochlorine Pesticides by Alkyl Dithiol-Functionalized Metal Nanoparticles-Induced Plasmonic Hot Spots
TLDR
The present results confirm the high sensitivity of SERS for the detection of the organochlorine pesticides with a limit of detection reaching 10(-8) M, thus providing a solid basis for the construction of suitable nanosensors for the identification and quantitative analysis of this type of chemical.Abstract:
In this work, we report the detection of the organochlorine pesticides aldrin, dieldrin, lindane, and α-endosulfan by using surface-enhanced Raman spectroscopy (SERS) and optimization of the SERS-sensing substrate. In order to overcome the inherent problem of the low affinity of the above pesticides, we have developed a strategy consisting of functionalization of the metal surface with alkyl dithiols in order to achieve two different goals: (i) to induce the nanoparticle linkage and create interparticle junctions where sensitive hot spots needed for SERS enhancement are present, and (ii) to create a specific environment in the nanogaps between silver and gold nanoparticles, making them suitable for the assembly and SERS detection of the analyzed pesticides. Afterward, an optimization of the sensing substrate was performed by varying the experimental conditions: type of metal nanoparticles, molecular linker (aromatic versus aliphatic dithiols and the length of the intermediate chain), surface coverage, las...read more
Citations
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Journal ArticleDOI
Bidentate Aromatic Thiols on Gold: New Insight Regarding the Influence of Branching on the Structure, Packing, Wetting, and Stability of Self-Assembled Monolayers on Gold Surfaces
Supachai Rittikulsittichai,Chul Soon Park,Andrew C. Jamison,Daniela Rodriguez,Oussama Zenasni,T. Randall Lee +5 more
TL;DR: The desorption profiles obtained in isooctane at 80 °C suggested that the bidentate adsorbate with the most densely packed alkyl chains, R3ArDT, was significantly more stable than the other SAMs, producing the following relative order for thermal stability for the dithiolate SAMs.
Journal ArticleDOI
Nanopillar-Assisted SERS Chromatography
TL;DR: NPC-SERS transforms SERS into a sensing technique with general applicability, facilitating rapid and quantitative detection of analytes in complex biofluids, such as saliva, blood, and urine.
Journal ArticleDOI
Probing catecholamine neurotransmitters based on iron-coordination surface-enhanced resonance Raman spectroscopy label
Xiaomin Cao,Xiaomin Cao,Miao Qin,Pan Li,Binbin Zhou,Binbin Zhou,Xianghu Tang,Meihong Ge,Meihong Ge,Liangbao Yang,Liangbao Yang,Jinhuai Liu +11 more
TL;DR: Wang et al. as discussed by the authors employed surfaceenhanced resonance Raman spectroscopy (SERRS) strategy, iron-nitrilotriacetic acid functionalized PVP-Au NPs (Au-Fe(NTA)) as Raman label for rapid and sensitive detection of CA containing dopamine (DA), norepinephrine (NE) or epinephrine (EP) in complex serum.
Journal ArticleDOI
Sensitive Detection of Competitive Molecular Adsorption by Surface Enhanced Raman Spectroscopy
TL;DR: The successful demonstration of the sensitive and selective characterization of surface adsorption lends SERS adaptability to a cheap, facile, and effective solution for chemical analysis.
Journal ArticleDOI
In-situ surface-enhanced Raman scattering based on MTi20 nanoflowers: Monitoring and degradation of contaminants
Yingnan Quan,Rui Su,Shuo Yang,Lei Chen,Maobin Wei,Huilian Liu,Jinghai Yang,Ming Gao,Baizhi Li +8 more
TL;DR: In this paper, an effective and versatile SERS platform assembled from MoS2 nanoflowers (NFs) and TiO2 nanoparticles (NPs) was prepared successfully for real-time and in-situ monitoring of chemical reactions.
References
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Journal ArticleDOI
Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering
Shuming Nie,Steven R. Emory +1 more
TL;DR: In this article, surface-enhanced Raman scattering was used to detect single molecules and single nanoparticles at room temperature with the use of surface enhanced Raman, and the intrinsic Raman enhancement factors were on the order of 10 14 to 10 15, much larger than the ensemble-averaged values derived from conventional measurements.
Journal ArticleDOI
Controlled nucleation for the regulation of the particle size in monodisperse gold suspensions
TL;DR: In this article, a series of monodisperse suspensions of the same chemical composition but of rather different particle sizes was used to study particle size dependent phenomena, such as Brownian motion, light scattering, sedimentation and electrophoresis of small particles.
Journal ArticleDOI
Surface-enhanced spectroscopy
TL;DR: The surface-enhanced Raman scattering (SERS) effect was first discovered by Fleischmann, Van Duyne, Creighton, and Creighton as discussed by the authors, who showed that molecules adsorbed on specially prepared silver surfaces produce a Raman spectrum that is at times a millionfold more intense than expected.
Journal ArticleDOI
Pesticides and Health Risks
TL;DR: Clinical implications are reviewed, and recommendations are made regarding the integration of this environmental health concern into nursing education, practice, research, and policy/advocacy work.