NDLI: MEMS sensor for detecting mercury at ppb levels

Content Provider	IEEE Xplore Digital Library
Author	Scaggs, J. Russell, D.D. Hill, M.W. Duttagupta, S.P.
Copyright Year	2001
Description	Author affiliation: Dept. of Chem., Boise State Univ., ID, USA (Scaggs, J.)
Abstract	Summary form only given. Sub-surface science research is necessary to assist the Department of Energy (DOE) in solving complex environmental problems associated with hazardous contaminants in soil and groundwater at DOE sites. These contaminants include hazardous metals such as mercury. A novel mercury ion selective electrode has been constructed to have a strongly coordinating macrocyclic ligand binding site covalently attached to a polythiophene film using 1-1,4,10-trioxa-7,13-diazacyclopentadecane-1-thiophenylmethane (TDCD-thiophenylmethane) as a specific chelator. In amperometric mode, the current is proportional to mercury (II) concentrations down to 2 ppb. Reversible cyclic voltammetric waves show that both mercury (I) and mercury (II) are stabilized by the ligand. Monomethyl mercury and vapor phase elemental mercury are also electrochemically determined. Dissolved oxygen and heavy metal cations show no significant interference, even at ten times the Hg concentration. The polymer surface shows robust performance for two years or longer. Fabrication strategies are being developed to optimize probe performance. Variables under study include substrate surface roughness, the ratio of derivatized thiophene (TDCD-thiophenylmethane) to underivatized thiophene in the surface polymer, ratio of thiophene with two chelating rings to thiophene with only one, number and thickness of electrodeposited polymer layers, composition of polymer layers, and number of -CH/sub 2/- units separating the chelating ring from the thiophene monomer units. The probe exhibits linear response to Hg concentration, and detects Hg in several forms.
Sponsorship	IEEE Electron Devices Soc.
File Size	64102
File Format	PDF
ISBN	0780366913
ISSN	07496877
DOI	10.1109/UGIM.2001.960321
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Micromechanical devices Polymers Mercury (metals) Rough surfaces Surface roughness US Department of Energy Probes Environmental factors Soil Electrodes
Content Type	Text
Resource Type	Article

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

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