Metallic carbide nanoparticles as stable and reusable substrates for sensitive surface-enhanced Raman spectroscopy

2018 ◽  
Vol 54 (77) ◽  
pp. 10843-10846 ◽  
Author(s):  
Hua Bai ◽  
Wei Liu ◽  
Wencai Yi ◽  
Xinshi Li ◽  
Junfeng Zhai ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Resonance Effect ◽  
Reduction Process ◽  
High Sensitivity ◽  
Surface Enhanced Raman Spectroscopy ◽  
Thermal Reduction ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Magnesium Thermal Reduction

Carbide SERS substrates: nearly monodispersed TaC nanoparticles with a strong plasma resonance effect are synthesized via a magnesium thermal reduction process. As non-noble metal SERS substrates, they offer high sensitivity, outstanding stability, and excellent recyclability.

scholarly journals MoS2 Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy

Biosensors ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 477
Author(s):  
Samar Ali Ghopry ◽  
Seyed M. Sadeghi ◽  
Cindy L. Berrie ◽  
Judy Z. Wu
Keyword(s):  
Raman Spectroscopy ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
High Sensitivity ◽  
Surface Enhanced Raman Spectroscopy ◽  
Metal Nanostructures ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Order Of Magnitude

Nanohybrids of graphene and two-dimensional (2D) layered transition metal dichalcogenides (TMD) nanostructures can provide a promising substrate for extraordinary surface-enhanced Raman spectroscopy (SERS) due to the combined electromagnetic enhancement on TMD nanostructures via localized surface plasmonic resonance (LSPR) and chemical enhancement on graphene. In these nanohybrid SERS substrates, the LSPR on TMD nanostructures is affected by the TMD morphology. Herein, we report the first successful growth of MoS2 nanodonuts (N-donuts) on graphene using a vapor transport process on graphene. Using Rhodamine 6G (R6G) as a probe, SERS spectra were compared on MoS2 N-donuts/graphene nanohybrids substrates. A remarkably high R6G SERS sensitivity up to 2 × 10−12 M has been obtained, which can be attributed to the more robust LSPR effect than in other TMD nanostructures such as nanodiscs as suggested by the finite-difference time-domain simulation. This result demonstrates that non-metallic TMD/graphene nanohybrids substrates can have SERS sensitivity up to one order of magnitude higher than that reported on the plasmonic metal nanostructures/2D materials SERS substrates, providing a promising scheme for high-sensitivity, low-cost applications for biosensing.

scholarly journals Analysis of Biomolecules Based on the Surface Enhanced Raman Spectroscopy

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 730 ◽  
Author(s):  
Min Jia ◽  
Shenmiao Li ◽  
Liguo Zang ◽  
Xiaonan Lu ◽  
Hongyan Zhang
Keyword(s):  
Raman Spectroscopy ◽  
High Sensitivity ◽  
Surface Enhanced Raman Spectroscopy ◽  
Molecular Structures ◽  
Label Free ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
New Ideas

Analyzing biomolecules is essential for disease diagnostics, food safety inspection, environmental monitoring and pharmaceutical development. Surface-enhanced Raman spectroscopy (SERS) is a powerful tool for detecting biomolecules due to its high sensitivity, rapidness and specificity in identifying molecular structures. This review focuses on the SERS analysis of biomolecules originated from humans, animals, plants and microorganisms, combined with nanomaterials as SERS substrates and nanotags. Recent advances in SERS detection of target molecules were summarized with different detection strategies including label-free and label-mediated types. This comprehensive and critical summary of SERS analysis of biomolecules might help researchers from different scientific backgrounds spark new ideas and proposals.

Identification and Characterization of Artists' Red Dyes and Their Mixtures by Surface-Enhanced Raman Spectroscopy

2007 ◽  
Vol 61 (9) ◽  
pp. 994-1000 ◽  
Author(s):  
Alyson V. Whitney ◽  
Francesca Casadio ◽  
Richard P. Van Duyne
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Localized Surface Plasmon ◽  
Carminic Acid ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Lac Dye ◽  
Silver Island

Silver film over nanospheres (AgFONs) were successfully employed as surface-enhanced Raman spectroscopy (SERS) substrates to characterize several artists' red dyes including: alizarin, purpurin, carminic acid, cochineal, and lac dye. Spectra were collected on sample volumes (1 × 10−6 M or 15 ng/μL) similar to those that would be found in a museum setting and were found to be higher in resolution and consistency than those collected on silver island films (AgIFs). In fact, to the best of the authors' knowledge, this work presents the highest resolution spectrum of the artists' material cochineal to date. In order to determine an optimized SERS system for dye identification, experiments were conducted in which laser excitation wavelengths were matched with correlating AgFON localized surface plasmon resonance (LSPR) maxima. Enhancements of approximately two orders of magnitude were seen when resonance SERS conditions were met in comparison to non-resonance SERS conditions. Finally, because most samples collected in a museum contain multiple dyestuffs, AgFONs were employed to simultaneously identify individual dyes within several dye mixtures. These results indicate that AgFONs have great potential to be used to identify not only real artwork samples containing a single dye but also samples containing dyes mixtures.

scholarly journals Surface-Enhanced Raman Scattering as an Emerging Characterization and Detection Technique

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Mustafa Culha ◽  
Brian Cullum ◽  
Nickolay Lavrik ◽  
Charles K. Klutse
Keyword(s):  
Raman Spectroscopy ◽  
Molecular Biology ◽  
Rapid Growth ◽  
Scientific Community ◽  
Surface Enhanced Raman Spectroscopy ◽  
Biological Applications ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

While surface-enhanced Raman spectroscopy (SERS) has been attracting a continuously increasing interest of scientific community since its discovery, it has enjoyed a particularly rapid growth in the last decade. Most notable recent advances in SERS include novel technological approaches to SERS substrates and innovative applications of SERS in medicine and molecular biology. While a number of excellent reviews devoted to SERS appeared in the literature over the last two decades, we will focus this paper more specifically on several promising trends that have been highlighted less frequently. In particular, we will briefly overview strategies in designing and fabricating SERS substrates using deterministic patterning and then cover most recent biological applications of SERS.

scholarly journals Fabrication of Silver Nanodendrites on Copper for Detecting Rhodamine 6G in Chili Powder Using Surface-enhanced Raman Spectroscopy

2021 ◽  
Vol 31 (4) ◽  
Author(s):  
Quynh-Ngan Luong ◽  
Tran Cao Dao ◽  
Thi Thu Vu ◽  
Manh Cuong Nguyen ◽  
Nhu Duong Nguyen
Keyword(s):  
Raman Spectroscopy ◽  
Rhodamine 6G ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Simple Method ◽  
Sers Substrates ◽  
Highly Active ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Silver Nanodendrites

Surface-enhanced Raman spectroscopy (SERS) is increasingly being used as a method for detecting traces of contaminants in a variety of specimens. In order to maximize SERS’s performance, the most important thing is to have highly active SERS substrates. In this report, we present a simple method for synthesizing silver nanodendrites (AgNDs) on the surface of a copper (Cu) plate using chemical deposition method. The results showed that, after fabrication, a large number of fern-like AgNDs formed on the Cu surface. These AgNDs are distributed evenly across the entire Cu surface with a relatively thick density. The prepared AgNDs were applied as SERS substrates for detecting Rhodamine 6G (R6G) in chili powders. The results showed that, using the prepared AgNDs substrates, as low as 10−10 M R6G in chili powders can be detected. This demonstrates the applicability of fabricated AgNDs as a highly active SERS substrate.

Sign in / Sign up

Export Citation Format

Share Document