Photoinduced synthesis of Ag nanoparticles on ZnO nanowires for real-time SERS systems

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 51-57 ◽  
Author(s):  
Hyun Wook Kang ◽  
Juyoung Leem ◽  
Hyung Jin Sung
Keyword(s):  
Real Time ◽  
Ag Nanoparticles ◽  
Enhancement Factor ◽  
Detection System ◽  
Microfluidic Channel ◽  
Zno Nanowires ◽  
Hierarchical Nanostructure ◽  
Sers Detection ◽  
Photoinduced Synthesis

Hierarchical nanostructure of Ag nanoparticles on ZnO nanowires is introduced by using a photoinduced synthesis. A real-time, in situ SERS detection system is achieved with a microfluidic channel. The hierarchical nanostructure shows 6.36 × 1011 of SERS enhancement factor.

scholarly journals Real Time In-situ Detection System Research for Methane in Offshore Shallow Gas based on Thin Film Interface

2018 ◽  
Vol 232 ◽  
pp. 04053
Author(s):  
Cheng-xing Miao ◽  
Qing Li ◽  
Sheng-yao Jia
Keyword(s):  
Real Time ◽  
Detection Efficiency ◽  
Detection System ◽  
Detection Methods ◽  
Shallow Gas ◽  
Micro Gas Sensor ◽  
Detection Probe ◽  
On Line ◽  
In Situ Detection

In order to get ridded of the non real-time detection methods of artificial site sampled and laboratory instrument analyzed in the field of methane detection in the offshore shallow gas, real-time in-situ detection system for methane in offshore shallow gas was designed by the film interface.The methane in the offshore shallow gas through the gas-liquid separation membrane of polymer permeation into the system internal detection probe, analog infrared micro gas sensor sensed the methane concentration and the corresponded output value, data acquisition and communication node fitted into standard gas concentration.Based on the experimental data compared with the traditional detection method, and further analyzed the causes of error produced by the case experiment. The application results show that the system can achieve a single borehole layout, long-term on-line in-situ on-line detection, and improve the detection efficiency and the timeliness of the detection data.

Monitoring the reactivity of Ag nanoparticles for different atmospheres by using in situ and real-time optical spectroscopy

2011 ◽  
Author(s):  
V. Antad ◽  
L. Simonot ◽  
D. Babonneau ◽  
S. Camelio ◽  
F. Pailloux ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Spectroscopy ◽  
Ag Nanoparticles

scholarly journals Non-destructive mid-IR spectroscopy with quantum cascade laser can detect ethylene gas dynamics of apple cultivar ‘Fuji’ in real time

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Masaki Yumoto ◽  
Yasushi Kawata ◽  
Tetsuya Abe ◽  
Tomoki Matsuyama ◽  
Satoshi Wada
Keyword(s):  
Real Time ◽  
Quantum Cascade Laser ◽  
Detection System ◽  
Gas Cell ◽  
Sampling System ◽  
Gas Sampling ◽  
Quantum Cascade ◽  
Concentration Changes ◽  
Non Destructive

AbstractMany plants, including fruits and vegetables, release biogenic gases containing various volatile organic compounds such as ethylene (C2H4), which is a gaseous phytohormone. Non-destructive and in-situ gas sampling technology to detect trace C2H4 released from plants in real time would be attractive for visualising the ageing, ripening, and defence reactions of plants. In this study, we developed a C2H4 detection system with a detection limit of 0.8 ppb (3σ) using laser absorption spectroscopy. The C2H4 detection system consists of a mid-infrared quantum cascade laser oscillated at 10.5 µm, a multi-pass gas cell, a mid-IR photodetector, and a gas sampling system. Using non-destructive and in-situ gas sampling, while maintaining the internal pressure of the multi-pass gas cell at low pressure, the change in trace C2H4 concentration released from apples (Malus domestica Borkh.) can be observed in real time. We succeeded in observing C2H4 concentration changes with a time resolution of 1 s, while changing the atmospheric gas and surface temperature of apples from the ‘Fuji’ cultivar. This technique allows the visualisation of detailed C2H4 dynamics in plant environmental response, which may be promising for further progress in plant physiology, agriculture, and food science.

Synergistic action of star-shaped Au/Ag nanoparticles decorated on AgFeO2 for ultrasensitive SERS detection of a chemical warfare agent on real samples

2020 ◽  
Vol 12 (10) ◽  
pp. 1342-1352 ◽  
Author(s):  
Nazar Riswana Barveen ◽  
Tzyy-Jiann Wang ◽  
Yu-Hsu Chang
Keyword(s):  
Ag Nanoparticles ◽  
Enhancement Factor ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Synergistic Action ◽  
Sers Substrate ◽  
Good Reproducibility ◽  
Ag Nps ◽  
Real Samples ◽  
Sers Detection

A novel SERS substrate with AgFeO2@Au/Ag NPs is prepared to detect paraoxon ethyl with a low LOD, high enhancement factor and good reproducibility.

SERS Detection of Bacteria in Water by in Situ Coating with Ag Nanoparticles

2014 ◽  
Vol 86 (3) ◽  
pp. 1525-1533 ◽  
Author(s):  
Haibo Zhou ◽  
Danting Yang ◽  
Natalia P. Ivleva ◽  
Nicoleta E. Mircescu ◽  
Reinhard Niessner ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Sers Detection ◽  
In Situ Coating

A system for real-time in situ photoelectron spectroscopy

2010 ◽  
Vol 1 (SRMS-7) ◽  
Author(s):  
D. P. Langstaff ◽  
O. R. Roberts ◽  
G. T. Williams ◽  
D. A. Evans
Keyword(s):  
Real Time ◽  
Photoelectron Spectroscopy ◽  
Detection System ◽  
Surface Preparation ◽  
Array Detector ◽  
Vacuum Vessel ◽  
Medium Temperature ◽  
Heating And Cooling ◽  
Efficient Detection

A system is presented which combines photoelectron spectroscopy with complementary characterization techniques in order to provide in situ analysis of surfaces processes. The real-time capability of photoelectron spectroscopy has been enabled by an electron counting array detector that allows core and valence level spectra to be recorded in 1–10 s using a laboratory X-ray source and as low as 25 ms when coupled to synchrotron radiation source.The efficient detection system is combined with a versatile heater stage, temperature and vacuum monitoring, and controllable evaporation sources in order to monitor chemical, structural and electronic changes in situ. The heated stage allows a range of programmed heating and cooling regimes to be applied to samples. Evaporation sources are provided for medium-temperature materials such as small organic molecules and high-temperature metals such as aluminium. The system has a linked vacuum vessel for plasma etching and Ar ion sputtering for surface preparation.

High performance Nanogold™-in situ hybridzation and its use in the detection of hybridized and PCR-amplified microscopical preparations

1996 ◽  
Vol 54 ◽  
pp. 896-897
Author(s):  
G. W. Hacker ◽  
I. Zehbe ◽  
J. Hainfeld ◽  
A.-H. Graf ◽  
C. Hauser-Kronberger ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Messenger Rna ◽  
High Performance ◽  
Detection System ◽  
Direct Methods ◽  
Genetic Alterations ◽  
Chain Reaction ◽  
Protein Encoding ◽  
Polymerase Chain

In situ hybridization (ISH) with biotin-labeled probes is increasingly used in histology, histopathology and molecular biology, to detect genetic nucleic acid sequences of interest, such as viruses, genetic alterations and peptide-/protein-encoding messenger RNA (mRNA). In situ polymerase chain reaction (PCR) (PCR in situ hybridization = PISH) and the new in situ self-sustained sequence replication-based amplification (3SR) method even allow the detection of single copies of DNA or RNA in cytological and histological material. However, there is a number of considerable problems with the in situ PCR methods available today: False positives due to mis-priming of DNA breakdown products contained in several types of cells causing non-specific incorporation of label in direct methods, and re-diffusion artefacts of amplicons into previously negative cells have been observed. To avoid these problems, super-sensitive ISH procedures can be used, and it is well known that the sensitivity and outcome of these methods partially depend on the detection system used.

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