A novel sensitive ACNTs-MoO2 SERS substrate boosted by synergistic enhancement effect

2021 ◽  
Author(s):  
Xiaoyu Zhou ◽  
Xiaoli Zhao ◽  
Shuo Gu ◽  
Kaiyue Gao ◽  
Fazhi Xie ◽  
...  
Keyword(s):  
Enhancement Effect ◽  
Sers Substrate ◽  
Electromagnetic Enhancement ◽  
Chemical Enhancement ◽  
Synergistic Enhancement

Integrating chemical enhancement (CM) and electromagnetic enhancement (EM) into one substrate is of great significance, but as far as we know, little research has been done on this project. In...

Synergistic Enhancement Effect for Boosting Raman Detection Sensitivity of Antibiotics

ACS Sensors ◽  
2019 ◽  
Vol 4 (11) ◽  
pp. 2958-2965 ◽  
Author(s):  
Yan Zhai ◽  
Yunshan Zheng ◽  
Zhiyuan Ma ◽  
Yanzheng Cai ◽  
Feng Wang ◽  
...  
Keyword(s):  
Detection Sensitivity ◽  
Enhancement Effect ◽  
Synergistic Enhancement

Chemically-Enhanced GaAs Maskless Etching Using a Novel Focused Ion Beam Etching System with a Chlorine Molecular and Radical Beam

1986 ◽  
Vol 75 ◽  
Author(s):  
N. Takado ◽  
K. Asakawa ◽  
H. Arimoto ◽  
T. Morita ◽  
S. Sugata ◽  
...  
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Substrate Surface ◽  
Maximum Yield ◽  
Laser Cavity ◽  
High Rate ◽  
Enhancement Effect ◽  
Scanning Time ◽  
Chemical Enhancement ◽  
Deep Groove

AbstractChlorine-enhanced GaAs maskless etching using a novel focused-ion-beametching (FIBE) system has been examined for establishing high-rate and smooth FIBE. The system is composed of an air-locked ultrahigh-vacuum chamber, a 30 KeV Ga+ FIB column and two kinds of chlorine-irradiation nozzles. A fine nozzle enabled us to irradiate a high-density Cl2 flux on a desired, small area of the sample while retaining a sufficiently low surrounding-gas pressure for stable Ga+ FIB emission. Highly chemically-enhanced sputtering yields (up to 50 GaAs molecules per incident ion) were obtained. At the maximum yield, line-scanned deep-groove (6.5 um) etching with a smooth surface, capable of fabricating a laser-cavity optical mirror, was demonstrated. The chemical-enhancement effect showed high FIB-scanning-time dependence. This effect was also observed by irradiating with a plasma-dissociated Cl radicals using a novel radical beam gun. An analytical model, based on the Ga+-ion bombardment on the chlorine-adsorbed substrate surface, suggested that the maximum chemical enhancement is obtained when the Ga+-FIB scanning time is adjusted to the chlorine-coverage time, given by the Cl2-molecule or Cl-radical flux density.

scholarly journals Novel Electrochemical Sensors Based on Cuprous Oxide-Electrochemically Reduced Graphene Oxide Nanocomposites Modified Electrode toward Sensitive Detection of Sunset Yellow

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2130 ◽  
Author(s):  
Quanguo He ◽  
Jun Liu ◽  
Xiaopeng Liu ◽  
Yonghui Xia ◽  
Guangli Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cuprous Oxide ◽  
Anodic Peak ◽  
Enhancement Effect ◽  
Sunset Yellow ◽  
Synergistic Enhancement ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Cu2o Nanoparticles

Control and detection of sunset yellow is an utmost demanding issue, due to the presence of potential risks for human health if excessively consumed or added. Herein, cuprous oxide-electrochemically reduced graphene nanocomposite modified glassy carbon electrode (Cu2O-ErGO/GCE) was developed for the determination of sunset yellow. The Cu2O-ErGO/GCE was fabricated by drop-casting Cu2O-GO dispersion on the GCE surface following a potentiostatic reduction of graphene oxide (GO). Scanning electron microscope and X-ray powder diffractometer was used to characterize the morphology and microstructure of the modification materials, such as Cu2O nanoparticles and Cu2O-ErGO nanocomposites. The electrochemical behavior of sunset yellow on the bare GCE, ErGO/GCE, and Cu2O-ErGO/GCE were investigated by cyclic voltammetry and second-derivative linear sweep voltammetry, respectively. The analytical parameters (including pH value, sweep rate, and accumulation parameters) were explored systematically. The results show that the anodic peak currents of Cu2O-ErGO /GCE are 25-fold higher than that of the bare GCE, due to the synergistic enhancement effect between Cu2O nanoparticles and ErGO sheets. Under the optimum detection conditions, the anodic peak currents are well linear to the concentrations of sunset yellow, ranging from 2.0 × 10−8 mol/L to 2.0 × 10−5 mol/L and from 2.0 × 10−5 mol/L to 1.0 × 10−4 mol/L with a low limit of detection (S/N = 3, 6.0 × 10−9 mol/L). Moreover, Cu2O-ErGO/GCE was successfully used for the determination of sunset yellow in beverages and food with good recovery. This proposed Cu2O-ErGO/GCE has an attractive prospect applications on the determination of sunset yellow in diverse real samples.

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