scholarly journals Dark-Field Scattering and Local SERS Mapping from Plasmonic Aluminum Bowtie Antenna Array

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 468 ◽  
Author(s):  
Thang Duy Dao ◽  
Chung Vu Hoang ◽  
Natsuki Nishio ◽  
Naoki Yamamoto ◽  
Akihiko Ohi ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Noble Metals ◽  
Ultra Violet ◽  
Surface Enhanced Raman Spectroscopy ◽  
Dark Field ◽  
Infrared Range ◽  
Plasmonic Resonance ◽  
Free Standing ◽  
Bowtie Antenna ◽  
Surface Enhanced Raman

On the search for the practical plasmonic materials beyond noble metals, aluminum has been emerging as a favorable candidate as it is abundant and offers the possibility of tailoring the plasmonic resonance spanning from ultra-violet to the infrared range. In this letter, in combination with the numerical electromagnetic simulations, we experimentally study the dark-field scattering spectral mapping of plasmonic resonance from the free-standing Al bowtie antenna arrays and correlate their strong nearfield enhancement with the sensing capability by means of surface-enhanced Raman spectroscopy. The spatial matching of plasmonic and Raman mapping puts another step to realize a very promising application of free-standing Al bowtie antennas for plasmonic sensing.

In situ monitoring of catalytic process variations in a single nanowire by dark-field-assisted surface-enhanced Raman spectroscopy

2016 ◽  
Vol 52 (5) ◽  
pp. 1044-1047 ◽  
Author(s):  
Xin Shi ◽  
Hao-Wen Li ◽  
Yi-Lun Ying ◽  
Chang Liu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Process Variations ◽  
Surface Enhanced Raman Spectroscopy ◽  
Dark Field ◽  
In Situ Monitoring ◽  
Catalytic Process ◽  
Single Nanowire ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

In this communication, we provide a new method for characterizing the kinetics of a catalytic process on multiple sites of a single nanowire by dark-field-assisted surface-enhanced Raman spectroscopy (DFSERS).

scholarly journals In-Situ Growth of Two-Dimensional Gold Nanoclusters on Glass Surface for On-Site Surface-Enhanced Raman Spectroscopic Detection

2021 ◽  
Vol 9 ◽  
Author(s):  
Bin Tang ◽  
Fangyuan Han ◽  
Liping Zhu ◽  
Zongchang Luo ◽  
Jialin Wang ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Electric Power Industry ◽  
Surface Enhanced Raman Spectroscopy ◽  
Infrared Range ◽  
Excitation Wavelength ◽  
Insulating Oil ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Analytical science has always been calling for simple, fast and ultra-sensitive methods to sense molecules of interest. Surface-Enhanced Raman Spectroscopy (SERS) has drawn much attention as a convenient tool for molecular fingerprint characterization. In addition to sample preparation, the key point of sensitive SERS detection is the preparation of highly reproducible and sensitive SERS substrates. In this paper, 2D gold nanoclusters are grown on surfaces of glass slips using an in-situ cyclic growth method in aqueous solutions to prepare high-quality SERS substrates, whose surface morphology can be effectively modulated by adjusting a few parameters during preparation. Substrates prepared with optimized parameters exhibit high SERS activity, uniform response, and good batch-to-batch reproducibility. Due to their strong absorption in the near-infrared range, the substrates can be combined with a portable Raman spectrometer with 785 nm excitation wavelength to detect traces of dibenzyl disulfide (DBDS), a major source of corrosive sulfur in mineral insulating oil. A detection limit lower than 1 mg/L can be achieved with the aid of a simple sample pretreatment method, representing a promising on-site insulating oil analysis method for electric power industry.

Surface-enhanced Raman scattering on aluminum using near infrared and visible excitation

2014 ◽  
Vol 50 (28) ◽  
pp. 3744-3746 ◽  
Author(s):  
Klaus Bo Mogensen ◽  
Marina Gühlke ◽  
Janina Kneipp ◽  
Shima Kadkhodazadeh ◽  
Jakob B. Wagner ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Near Infrared ◽  
Surface Enhanced Raman Spectroscopy ◽  
Infrared Range ◽  
Support Surface ◽  
Aluminum Films ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Near Infrared Range

Discontinuous nanostructured aluminum films can support surface-enhanced Raman spectroscopy using excitation in the near infrared range.

scholarly journals Super Stability of Ag Nanoparticle in Crystalline Lamellar (Lc) Liquid Crystal Matrix at Different pH Environment

Symmetry ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 31
Author(s):  
Siti Mariah Mohd Yasin ◽  
Irfan Anjum Badruddin ◽  
Mohd Rafie Johan
Keyword(s):  
Liquid Crystal ◽  
Self Assembly ◽  
Ultra Violet ◽  
Surface Enhanced Raman Spectroscopy ◽  
Noble Metal Nanoparticles ◽  
Important Indicator ◽  
In Situ Preparation ◽  
Surface Enhanced Raman ◽  
Liquid Crystal Matrix ◽  
The Stability

The symmetry concept in this paper is related to the natural self-assembly of noble metal nanoparticles in the long range periodic structure of liquid crystal (LC). The current study deliberates the effect of pH on the stability of nanoparticles (NPs) in the lamellar phase of a lyotropic LC environment. The LC was prepared by the mass ratio 0.33:0.22:0.45 for (HDTABr):1-pentanol:water. The LC containing silver nanoparticles (AgNPs) was prepared by replacing the water with Ag solution. The AgNPs were produced by the in situ preparation method in LC. The solution of AgNPs-LC was varied at different pH. The absorption intensities were determined by using ultra-violet spectroscopy (UV-vis). The surface potential and hydrodynamic particle size were determined by using Zeta-potential (measurements). The surface enhanced Raman spectroscopy (SERS) was carried out to enhance the Raman signals of 4-aminobenzenethiol (4-ABT) deposited onto AgNPs as substrate. It is found that all characterizations exhibited super stability for AgNPs dispersed in LC at pH = 3 to 12 with the optimum stability at pH = 5–6. The remarkable stability of NPs is an important indicator of the various applications in nanotechnology and nanoscience fields.

scholarly journals Developing Hollow-Channel Gold Nanoflowers as Trimodal Intracellular Nanoprobes

2018 ◽  
Vol 19 (8) ◽  
pp. 2327 ◽  
Author(s):  
Sunjie Ye ◽  
May Wheeler ◽  
James McLaughlan ◽  
Abiral Tamang ◽  
Christine Diggle ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Single Cell Analysis ◽  
Surface Enhanced Raman Spectroscopy ◽  
Dark Field ◽  
Microscopy Imaging ◽  
Gold Nanoflowers ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Spherical Gold Nanoparticles ◽  
Low Cytotoxicity

Gold nanoparticles-enabled intracellular surface-enhanced Raman spectroscopy (SERS) provides a sensitive and promising technique for single cell analysis. Compared with spherical gold nanoparticles, gold nanoflowers, i.e., flower-shaped gold nanostructures, can produce a stronger SERS signal. Current exploration of gold nanoflowers for intracellular SERS has been considerably limited by the difficulties in preparation, as well as background signal and cytotoxicity arising from the surfactant capping layer. Recently, we have developed a facile and surfactant-free method for fabricating hollow-channel gold nanoflowers (HAuNFs) with great single-particle SERS activity. In this paper, we investigate the cellular uptake and cytotoxicity of our HAuNFs using a RAW 264.7 macrophage cell line, and have observed effective cellular internalization and low cytotoxicity. We have further engineered our HAuNFs into SERS-active tags, and demonstrated the functionality of the obtained tags as trimodal nanoprobes for dark-field and fluorescence microscopy imaging, together with intracellular SERS.

Free-standing Ag triangle arrays a configurable vertical gap for surface enhanced Raman spectroscopy

2017 ◽  
Vol 28 (38) ◽  
pp. 385401 ◽  
Author(s):  
Kuanguo Li ◽  
Yong Wang ◽  
Kang Jiang ◽  
Yuan Ren ◽  
Yanqiu Dai ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Free Standing ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Vertical Gap

scholarly journals A metal–dielectric–graphene sandwich for surface enhanced Raman spectroscopy

Nanoscale ◽  
2014 ◽  
Vol 6 (17) ◽  
pp. 9925-9929 ◽  
Author(s):  
Xuechao Yu ◽  
Jin Tao ◽  
Youde Shen ◽  
Guozhen Liang ◽  
Tao Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Fluorescence Quenching ◽  
Dielectric Layer ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Intensity ◽  
Plasmonic Resonance ◽  
Resonance Enhancement ◽  
Surface Enhanced ◽  
Graphene Interface ◽  
Surface Enhanced Raman

The Raman intensity of Rhodamine B (RhB) is enhanced by inserting a thin high κ dielectric layer which reduces the surface plasmon damping at the gold–graphene interface. The results indicate that the Raman intensity increases sharply by plasmonic resonance enhancement while maintaining efficient fluorescence quenching with optimized dielectric layer thickness.

Simultaneously Intensified Plasmonic and Charge Transfer Effects in Surface Enhanced Raman Scattering Sensors Using MXene-Blanketed Au Nanoparticles Assembly

2022 ◽  
Author(s):  
Seong Soo Yoo ◽  
Jeong-Won Ho ◽  
Dong-In Shin ◽  
Minjun Kim ◽  
Sung Hwan Hong ◽  
...  
Keyword(s):  
Signal Amplification ◽  
Au Nanoparticles ◽  
Surface Enhanced Raman Spectroscopy ◽  
Plasmonic Resonance ◽  
Transfer Effects ◽  
Surface Plasmonic Resonance ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Surface enhanced Raman spectroscopy (SERS) is an ultrasensitive tool for detecting wide range of analytes. The signal amplification is generally attributed by two different mechanisms of localized surface plasmonic resonance...

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