Physically Self-assembled Au Nanorod Arrays for SERS

2006 ◽  
Vol 951 ◽  
Author(s):  
Motofumi Suzuki ◽  
Kaoru Nakajima ◽  
Kenji Kimura ◽  
Takao Fukuoka ◽  
Yasushige Mori
Keyword(s):  
Raman Spectroscopy ◽  
Low Cost ◽  
Major Axis ◽  
Surface Enhanced Raman Spectroscopy ◽  
Nanorod Arrays ◽  
Au Nanorods ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Oblique Deposition ◽  
Selection Of

ABSTRACTWe have demonstrated surface-enhanced Raman spectroscopy on arrays of Au nanorods aligned in line by a dynamic oblique deposition technique. For the light polarized along the major axis of the nanorods, the plasma resonance of the Au nanorods has been tuned to a wavelength suitable for Raman spectroscopy. The Raman scattering on the discrete nanorods is enhanced significantly compared with that on semi continuous Au films. Since the preparation process is physically bottom-up, it is robust in its selection of the materials and is useful in providing the SERS sensors at low cost.

Combining vancomycin-modified gold nanorod arrays and colloidal nanoparticles as the sandwich model for discrimination of gram-positive bacteria and their detection via surface-enhanced Raman spectroscopy (SERS)

The Analyst ◽  
2021 ◽  
Author(s):  
Araz Norouz Dizaji ◽  
Nihal Simsek Ozek ◽  
Ferhunde Aysin ◽  
Ayfer Calis ◽  
Asli Yilmaz ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Colloidal Nanoparticles ◽  
Nanorod Arrays ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Sensor Platform ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

This study reports the development of a highly sensitive antibiotic-based discrimination and sensor platform for the detection of gram-positive bacteria through surface-enhanced Raman spectroscopy (SERS). Herein, the combination of gold...

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.

scholarly journals Silver-Nanoparticle-Decorated Gold Nanorod Arrays via Bioinspired Polydopamine Coating as Surface-Enhanced Raman Spectroscopy (SERS) Platforms

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 198 ◽  
Author(s):  
Mehmet Yilmaz
Keyword(s):  
Raman Spectroscopy ◽  
Deposition Time ◽  
Surface Enhanced Raman Spectroscopy ◽  
Gold Nanorod ◽  
Nanorod Arrays ◽  
Plasmonic Material ◽  
Relative Standard ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Controlled Deposition

The controlled deposition of nanoparticles onto 3-D nanostructured films is still facing challenges due to the uncontrolled aggregation of colloidal nanoparticles. In the context of this study, a simple yet effective approach is demonstrated to decorate the silver nanoparticles (AgNP) onto the 3-D and anisotropic gold nanorod arrays (GNAs) through a bioinspired polydopamine (PDOP) coating to fabricate surface-enhanced Raman spectroscopy (SERS) platforms. Since the Raman reporter molecules (methylene blue, MB, 10 µM) were not adsorbed directly on the surface of the plasmonic material, a remarkable decrease in SERS signals was detected for the PDOP-coated GNAs (GNA@PDOP) platforms. However, after uniform and well-controlled AgNP decoration on the GNA@PDOP (GNA@PDOP@AgNP), huge enhancement was observed in SERS signals from the resultant platform due to the synergistic action which originated from the interaction of GNAs and AgNPs. I also detected that PDOP deposition time (i.e., PDOP film thickness) is the dominant parameter that determines the SERS activity of the final system and 30 min of PDOP deposition time (i.e., 3 nm of PDOP thickness) is the optimum value to obtain the highest SERS signal. To test the reproducibility of GNA@PDOP@AgNP platforms, relative standard deviation (RSD) values for the characteristic peaks of MB were found to be less than 0.17, demonstrating the acceptable reproducibility all over the proposed platform. This report suggests that GNA@PDOP@AgNP system may be used as a robust platform for practical SERS applications.

scholarly journals A simple and reliable approach for the fabrication of nanoporous silver patterns for surface-enhanced Raman spectroscopy applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Angela Capaccio ◽  
Antonio Sasso ◽  
Giulia Rusciano
Keyword(s):  
Raman Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Cost Effective ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Signal ◽  
Plasmonic Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Good Signal

AbstractThe fabrication of plasmonic nanostructures with a reliable, low cost and easy approach has become a crucial and urgent challenge in many fields, including surface-enhanced Raman spectroscopy (SERS) based applications. In this frame, nanoporous metal films are quite attractive, due to their intrinsic large surface area and high density of metal nanogaps, acting as hot-spots for Raman signal enhancement. In this paper, we report a detailed study on the fabrication of nanoporous silver-based SERS substrates, obtained by the application of two successive treatments with an Inductively Coupled Plasma (ICP) system, using synthetic air and Ar as feeding gases. The obtained substrates exhibit a quite broad plasmonic response, covering the Vis–NIR range, and an enhancement factor reaching 6.5 $$\times\, 10^7$$ × 10 7 , estimated by using 4-mercaptobenzoic acid (4-MBA) as probe molecule at 532 nm. Moreover, the substrates exhibit a quite good spatial reproducibility on a centimeter scale, which assures a good signal stability for analytical measurements. Globally, the developed protocol is easy and cost effective, potentially usable also for mass production thanks to the remarkable inter-batches reproducibility. As such, it holds promise for its use in SERS-based sensing platforms for sensitive detection of targets molecules.

ZnO–Ag hybrids for ultrasensitive detection of trinitrotoluene by surface-enhanced Raman spectroscopy

2014 ◽  
Vol 16 (28) ◽  
pp. 14706-14712 ◽  
Author(s):  
Xuan He ◽  
Hui Wang ◽  
Zhongbo Li ◽  
Dong Chen ◽  
Qi Zhang
Keyword(s):  
Raman Spectroscopy ◽  
Low Cost ◽  
High Sensitivity ◽  
Surface Enhanced Raman Spectroscopy ◽  
Ultrasensitive Detection ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Hybrid Substrates ◽  
Tnt Detection

Low-cost SERS sensors were fabricated by 4-ATP-functionalized ZnO–Ag hybrid substrates for TNT detection with high sensitivity, selectivity and reproducibility.

ZnO oxide films for ultrasensitive, rapid, and label-free detection of neopterin by surface-enhanced Raman spectroscopy

The Analyst ◽  
2015 ◽  
Vol 140 (15) ◽  
pp. 5090-5098 ◽  
Author(s):  
Agnieszka Kamińska ◽  
Aneta Aniela Kowalska ◽  
Dmytro Snigurenko ◽  
Elżbieta Guziewicz ◽  
Janusz Lewiński ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Low Cost ◽  
Surface Enhanced Raman Spectroscopy ◽  
Label Free ◽  
Sers Substrates ◽  
Label Free Detection ◽  
Surface Enhanced ◽  
Cost Surface ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Efficient and low-cost surface-enhanced Raman scattering (SERS) substrates based on Au coated zinc oxide layers for the detection of neopterin were prepared.

The development of “fab-chips” as low-cost, sensitive surface-enhanced Raman spectroscopy (SERS) substrates for analytical applications

The Analyst ◽  
2015 ◽  
Vol 140 (3) ◽  
pp. 779-785 ◽  
Author(s):  
Ashley M. Robinson ◽  
Lili Zhao ◽  
Marwa Y. Shah Alam ◽  
Paridhi Bhandari ◽  
Scott G. Harroun ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Silver Nanoparticles ◽  
Chemical Sensing ◽  
Low Cost ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrates ◽  
Sensing Applications ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Modification of metal-coated zari fabric chips with silver nanoparticles results in sensitive, affordable SERS substrates which are useful for a wide range of chemical sensing applications.

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