Design, synthesis, fabrication and simulation of conjugated molecule for detection of lithium ions

Mallya, Ashwini N and Poduval, Mithrabinda K and Ramamurthy, Praveen C (2019) Design, synthesis, fabrication and simulation of conjugated molecule for detection of lithium ions. In: MATERIALS RESEARCH EXPRESS, 6 (4).

PDF Mat_Res_Exp_6-4_2019.pdf Restricted to Registered users only Download (1MB) | Request a copy

Abstract

Alkali metal ions such as lithium, sodium and potassium are essential chemical species present in biological fluids (0.5-1.2 mM) and less hazardous quantity (0.9 mu M-12 mu M) present in drinking water. Lithium salts are used in pharmaceuticals, in ores and minerals, in Li-ion batteries. Ingestion of water source containing lithium concentration above 0.2 mM affects normal functioning of the body. Hence it is important to detect these ions in potable water. Here, a conjugated molecule based sensor for detection of lithium ion in water is developed. The conjugated molecule has a receptor moiety to capture the ion. The conjugated molecule interaction with alkali metal ions - Li+,Na+ and K+ is studied by density functional theory and interference analysis. The resistive based sensor is fabricated and device characteristics are studied. The experimental and simulation results suggest that the conjugated molecule interaction specifically with Li+ is relatively stronger. The lower limit of detection of the sensor is observed to be 0.05 mM. This limit is within the range of the lithium ion concentration found in biological fluids.

Item Type:	Journal Article
Publication:	MATERIALS RESEARCH EXPRESS
Publisher:	IOP PUBLISHING LTD
Additional Information:	Copyright of this article belongs to IOP PUBLISHING LTD
Keywords:	lithium ion; sensor; chemiresistor; conjugated molecule; tetraethylene glycol
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	29 Jan 2019 09:46
Last Modified:	29 Jan 2019 09:46
URI:	http://eprints.iisc.ac.in/id/eprint/61575

Actions (login required)

View Item