Chemical preparation and applications of silver dendrites

2014 ◽  
Vol 68 (10) ◽  
Author(s):  
Li Fu ◽  
Tasnuva Tamanna ◽  
Wen-Jing Hu ◽  
Aimin Yu
Keyword(s):  
Hierarchical Structures ◽  
Surface Enhanced Raman Spectroscopy ◽  
Future Research ◽  
Surface Enhanced Fluorescence ◽  
Preparation Methods ◽  
Practical Applications ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Methods Of Synthesis ◽  
Silver Dendrites

AbstractSilver dendrites have received immense attention because of their fascinating hierarchical structures and unique properties. Depending on the methods of synthesis, Ag dendrites can be implemented in numerous fields. This review summarizes a variety of Ag dendrites preparation techniques. The involved growth mechanisms are investigated in order to control the formation progress more effectively. With regard to the applications, this article mainly focuses on surface enhanced Raman spectroscopy, catalysis, superhydrophobic surface and surface enhanced fluorescence by using Ag dendrites. The remaining issues of the preparation methods, which impede the practical applications of Ag dendrites, are pointed out to enlighten their future research.

scholarly journals Large-Scale Fabrication of Nanostructure on Bio-Metallic Substrate for Surface Enhanced Raman and Fluorescence Scattering

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 916 ◽  
Author(s):  
Lu ◽  
Zhang ◽  
Jiao ◽  
Guan
Keyword(s):  
Large Scale ◽  
Hierarchical Structures ◽  
Metallic Substrate ◽  
Nano Particles ◽  
Fluorescence Signal ◽  
Dual Mode ◽  
Surface Enhanced Fluorescence ◽  
Relative Standard ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The integration of surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF) has attracted increasing interest and is highly probable to improve the sensitivity and reproducibility of spectroscopic investigations in biomedical fields. In this work, dual-mode SERS and SEF hierarchical structures have been developed on a single bio-metallic substrate. The hierarchical structure was composed of micro-grooves, nano-particles, and nano-ripples. The crystal violet was selected as reporter molecule and both the intensity of Raman and fluorescence signals were enhanced because of the dual-mode SERS−SEF phenomena with enhancement factors (EFs) of 7.85 × 105 and 14.32, respectively. The Raman and fluorescence signals also exhibited good uniformity with the relative standard deviation value of 2.46% and 5.15%, respectively. Moreover, the substrate exhibited high sensitivity with the limits of detection (LOD) as low as 1 × 10−11 mol/L using Raman spectroscopy and 1 × 10−10 mol/L by fluorescence spectroscopy. The combined effect of surface plasmon resonance and “hot spots” induced by the hierarchical laser induced periodical surface structures (LIPSS) was mainly contributed to the enhancement of Raman and fluorescence signal. We propose that the integration of SERS and SEF in a single bio-metallic substrate is promising to improve the sensitivity and reproducibility of detection in biomedical investigations.

scholarly journals 3D Silver Dendrites for Single‐molecule Imaging by Surface‐enhanced Raman Spectroscopy

ChemNanoMat ◽  
2020 ◽  
Author(s):  
Hanna V. Bandarenka ◽  
Nadzeya V. Khinevich ◽  
Aliaksandr A. Burko ◽  
Sergey V. Redko ◽  
Siarhei A. Zavatski ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Single Molecule ◽  
Surface Enhanced Raman Spectroscopy ◽  
Single Molecule Imaging ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Silver Dendrites

scholarly journals Nanostructured silver dendrites for photon-induced Cysteine dimerization

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chia‐Yu Chang ◽  
Yu‐Mei Chen ◽  
Yu‐Bin Huang ◽  
Chin-Hung Lai ◽  
U-Ser Jeng ◽  
...  
Keyword(s):  
Functional Groups ◽  
Coupling Reaction ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Scattering Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Alkaline Conditions ◽  
Silver Dendrites ◽  
Acidic Conditions ◽  
Controlled Adsorption

AbstractUnder a controlled adsorption environment, L-cysteine molecules can be chemically adsorbed to the dendritic silver (Ag-D) surface by electrochemical methods with different functional groups. It is verified by surface-enhanced Raman spectroscopy that under alkaline conditions (pH = 13.50), the two functional groups of thiol and acid are simultaneously adsorbed on the surface of Ag-D, while NH2 is far from the surface; under acidic conditions (pH = 1.67), adsorption behavior suggests that both NH3+ and COO− are oriented toward the Ag-D surface, and that SH is far from the surface. The structure of L-cysteine adsorption under acidic conditions can be further verified by the addition of an L-cysteine molecule through light-induced coupling reaction to form cystine. Finally, in-situ two-dimensional Raman scattering spectroscopy confirmed the feasibility and uniformity of the coupling reaction.

Chemically synthesized noble metal nanostructures for plasmonics

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Hongyan Liang ◽  
Hong Wei ◽  
Deng Pan ◽  
Hongxing Xu
Keyword(s):  
Noble Metal ◽  
Information Technologies ◽  
Surface Enhanced Raman Spectroscopy ◽  
Metal Nanostructures ◽  
Plasmonic Nanostructures ◽  
Practical Applications ◽  
Nanophotonic Devices ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Noble Metal Nanostructures

AbstractNoble metal nanostructures have drawn attentions of researchers in many fields due to their particular optical properties. Controlling the metal nanostructures’ size, shape, material, assembly, and surrounding environment can tune their unique plasmonic features that are important for practical applications. In this review, we firstly discuss some novel metal nanostructures synthesized through wet chemical methods and their fundamental plasmonic properties. Then, some applications of these chemically synthesized nanostructures in plasmonics are highlighted, including surface-enhanced Raman spectroscopy, plasmonic sensing, optical nanoantennas, and plasmonic circuitry. Plasmonic nanostructures provide the ways to manipulate light at the nanometer scale and open the prospects of developing nanophotonic devices for sensing and information technologies.

scholarly journals Nano-substructured plasmonic pore arrays: a robust, low cost route to reproducible hierarchical structures extended across macroscopic dimensions

2020 ◽  
Vol 2 (10) ◽  
pp. 4740-4756
Author(s):  
Aurélien V. Gimenez ◽  
Kiang W. Kho ◽  
Tia E. Keyes
Keyword(s):  
Raman Spectroscopy ◽  
Low Cost ◽  
Hierarchical Structures ◽  
Surface Enhanced Raman Spectroscopy ◽  
Simple Approach ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

A simple approach to reproducibly nano-sub-structuring the cavity interiors in periodic pore arrays improves performance in surface enhanced Raman spectroscopy and metal enhanced fluorescence.

scholarly journals Surface-Enhanced Raman Spectroscopy in Cancer Diagnosis, Prognosis and Monitoring

Cancers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 748 ◽  
Author(s):  
Luca Guerrini ◽  
Ramon A. Alvarez-Puebla
Keyword(s):  
Real Life ◽  
Surface Enhanced Raman Spectroscopy ◽  
Future Research ◽  
Special Focus ◽  
Dynamic Heterogeneity ◽  
Non Invasive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Optical Nanosensors ◽  
High Degree

As medicine continues to advance our understanding of and knowledge about the complex and multifactorial nature of cancer, new major technological challenges have emerged in the design of analytical methods capable of characterizing and assessing the dynamic heterogeneity of cancer for diagnosis, prognosis and monitoring, as required by precision medicine. With this aim, novel nanotechnological approaches have been pursued and developed for overcoming intrinsic and current limitations of conventional methods in terms of rapidity, sensitivity, multiplicity, non-invasive procedures and cost. Eminently, a special focus has been put on their implementation in liquid biopsy analysis. Among optical nanosensors, those based on surface-enhanced Raman scattering (SERS) have been attracting tremendous attention due to the combination of the intrinsic prerogatives of the technique (e.g., sensitivity and structural specificity) and the high degree of refinement in nano-manufacturing, which translate into reliable and robust real-life applications. In this review, we categorize the diverse strategic approaches of SERS biosensors for targeting different classes of tumor biomarkers (cells, nucleic acids and proteins) by illustrating key recent research works. We will also discuss the current limitations and future research challenges to be addressed to improve the competitiveness of SERS over other methodologies in cancer medicine.

scholarly journals Recent Advances in Spectroscopy Technology for Trace Analysis of Persistent Organic Pollutants

2019 ◽  
Vol 9 (17) ◽  
pp. 3439 ◽  
Author(s):  
Li Wang ◽  
Shujie Pang ◽  
Gang Zhou
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
High Performance ◽  
Surface Enhanced Raman Spectroscopy ◽  
Practical Applications ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycyclic Aromatic ◽  
Sensitivity Specificity ◽  
Significant Attention

Persistent organic pollutants (POPs) have attracted significant attention because of their bioaccumulation, persistence, and toxicity. As anthropogenic products, POPs mainly contain polychlorinated biphenyls (PCBs), organochlorine pesticides (OPs), and polycyclic aromatic hydrocarbons (PAHs), and they pose a great threat to human health and the environment. To deal with these toxic contaminants, many different kinds of strategies for sensitively detecting POPs have been developed, such as high performance liquid chromatography (HPLC), surface enhanced Raman spectroscopy (SERS), and fluorescence. This paper mainly summarized the achievements of spectroscopy technologies, which generally consist of SERS, surface plasmon resonance (SPR), and fluorescence, in the detection of low-concentration POPs in different matrices. In addition, a retrospective summary is made on several critical considerations, such as sensitivity, specificity and reproducibility of these spectroscopy technologies in practical applications. Finally, some current challenges and future outlooks for these spectroscopy technologies are provided in regards to environmental analysis.

Detection of a Foreign Protein in Milk Using Surface-Enhanced Raman Spectroscopy Coupled with Antibody-Modified Silver Dendrites

2011 ◽  
Vol 83 (5) ◽  
pp. 1510-1513 ◽  
Author(s):  
Lili He ◽  
Tom Rodda ◽  
Christy L. Haynes ◽  
Timothy Deschaines ◽  
Todd Strother ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Foreign Protein ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Silver Dendrites

Study of Surface Raman and Fluorescence Enhancement of RhB Molecules Adsorbed on Au Nanoparticles

2012 ◽  
Vol 20 ◽  
pp. 33-41 ◽  
Author(s):  
Jun Tang ◽  
Huan Fei Wen ◽  
Peng Lan Chai ◽  
Jun Liu ◽  
Yun Bo Shi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Deposition Time ◽  
Surface Enhanced Raman Spectroscopy ◽  
Au Nanoparticle ◽  
Enhanced Fluorescence ◽  
Surface Enhanced Fluorescence ◽  
Interesting Phenomenon ◽  
Nanoparticle Films ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

In this work, an interesting phenomenon demonstrating the similarities between the results from both Surface Enhanced Raman Spectroscopy (SERS) and Surface Enhanced Fluoresence (SEF) for rhodamine B (RhB) molecules adsorbed on gold nanoparticles was reported. By changing the deposition time, porous Au nanoparticle films with various densities and sizes were deposited. Via thermal annealing, the densities and sizes were modified. It is concluded from the results that the intensity of SERS and SEF varied in parallel with different Au nanoparticle films: different sizes and different densities. We believe that the results obtained can provide us with a reference when developing bio-chemical sensors based on Surface Enhanced Raman Spectroscopy and Surface Enhanced Fluorescence.

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