NDLI: Hybrid Arc/Glow Microdischarges at Atmospheric Pressure and Their Use in Portable Systems for Liquid and Gas Sensing

Content Provider	IEEE Xplore Digital Library
Author	Mitra, B. Levey, B. Gianchandani, Y.B.
Copyright Year	1973
Abstract	This paper reports on DC pulse-powered microdischarges in air at atmospheric pressure and their potential utility in chemical sensing. For electrode gaps of 50-100 mum, microdischarges take the form of a glow discharge, an arc discharge, or a hybrid of the two. Arc microdischarges have high optical intensity but suffer from high background emission. Glow microdischarges have low background emission, but the prominent emission is confined in the UV-blue region of the spectrum. The arc-glow hybrid has characteristics that are intermediate between the two and can be tuned by circuitry to suit the chemical sensing application. A handheld system for chemical analysis using synchronized emission spectroscopy of these pulsed microdischarges is demonstrated. The system employs an exchangeable sensor chip (different for gas and liquid samples), a control circuit, and a commercially available portable spectrum analyzer coupled to a handheld computer. A pump and inert carrier gases are not utilized. The system can generate one or a series of single-shot microdischarges per chemical analysis. The gas discharge microchip, which utilizes electroplated copper electrodes on a glass substrate, has an electrode separation of 75 mum and an active area of 300times300 mum². The handheld system has been used to detect 17 ppm of acetone vapor in air. The liquid discharge microchip also has an electrode gap of 75 mum and an active area of 1times1 mm². It uses a porous cathode fabricated by micromolding and sintering glass frit slurry in a microchannel. When a microdischarge is initiated between the metal anode and the wet cathode, the liquid is sputtered into the microdischarge and emits characteristic line spectra. In this configuration, the system can detect 2 ppm of aqueous Cr without preconcentration.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	1913
Ending Page	1924
Page Count	12
File Size	1470595
File Format	PDF
ISSN	00933813
Volume Number	36
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Chemical analysis Glass Cathodes Optical pulses Glow discharges Arc discharges Stimulated emission Optical pumping Optical sensors water chemistry Chemical sensing systems gas detectors gas discharge devices microarc microdischarge microplasma
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Diamond-Shaped Microplasma Device Using Thick Photoresist as a Barrier Rib in Ne–Ar Gas Mixtures

Optical and Electrical Diagnostics of a High-Frequency Glow–Arc Discharge and Its Application to the Synthesis of Carbon Nanofibers

Atmospheric DC Glow Discharge Observed in Intersecting Miniature Gas Flows

Phenomena of Microdischarges in Microplasma

The Detection of Chemical Vapors in Air Using Optical Emission Spectroscopy of Pulsed Microdischarges From Two- and Three- Electrode Microstructures

High current density spotless vacuum arc as a glow discharge

Striations in High-Pressure Hydrogen Microplasma

A Gamma Radiation Detector With Orthogonally Arrayed Micromachined Electrodes

Three-Dimensional Modeling of Self-Organization in DC Glow Microdischarges

Hybrid Arc/Glow Microdischarges at Atmospheric Pressure and Their Use in Portable Systems for Liquid and Gas Sensing

Similar Documents

Diamond-Shaped Microplasma Device Using Thick Photoresist as a Barrier Rib in Ne–Ar Gas Mixtures

Optical and Electrical Diagnostics of a High-Frequency Glow–Arc Discharge and Its Application to the Synthesis of Carbon Nanofibers

Atmospheric DC Glow Discharge Observed in Intersecting Miniature Gas Flows

Phenomena of Microdischarges in Microplasma

The Detection of Chemical Vapors in Air Using Optical Emission Spectroscopy of Pulsed Microdischarges From Two- and Three- Electrode Microstructures

High current density spotless vacuum arc as a glow discharge

Striations in High-Pressure Hydrogen Microplasma

A Gamma Radiation Detector With Orthogonally Arrayed Micromachined Electrodes

Three-Dimensional Modeling of Self-Organization in DC Glow Microdischarges

Hybrid Arc/Glow Microdischarges at Atmospheric Pressure and Their Use in Portable Systems for Liquid and Gas Sensing