Organic Field-Effect Transistor-Based Ultrafast, Flexible, Physiological-Temperature Sensors with Hexagonal Barium Titanate Nanocrystals in Amorphous Matrix as Sensing Material

Suman Mandal; Madhuchanda Banerjee; Satyajit Roy; Ajoy Mandal; Arnab Ghosh; Biswarup Satpati; Dipak K. Goswami

doi:10.1021/acsami.8b19051

Organic Field-Effect Transistor-Based Ultrafast, Flexible, Physiological-Temperature Sensors with Hexagonal Barium Titanate Nanocrystals in Amorphous Matrix as Sensing Material

Suman Mandal, Madhuchanda Banerjee, Satyajit Roy, Ajoy Mandal, Arnab Ghosh, Biswarup Satpati, Dipak K. Goswami

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Organic field-effect transistors (OFETs) with hexagonal barium titanate nanocrystals (h-BTNCs) in amorphous matrix as one of the bilayer dielectric systems have been fabricated on a highly flexible 10 μm thick poly(ethylene terephthalate) substrate. The device current and mobility remain constant up to a bending radius of 4 mm, which makes the substrate suitable for wearable e-skin applications. h-BTNC films are found to be highly temperature-sensitive, and the OFETs designed based on this material showed ultraprecision measurement (∼4.3 mK), low power (∼1 μW at 1.2 V operating voltage), and ultrafast response (∼24 ms) in sensing temperature over a range of 20-45 °C continuously. The sensors are highly stable around body temperature and work at various extreme conditions, such as under water and in solutions of different pH values and various salt concentrations. These properties make this sensor unique and highly suitable for various healthcare and other applications, wherein a small variation of temperature around this temperature range is required to be measured at an ultrahigh speed.

Original language	English
Pages (from-to)	4193-4202
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	4
DOIs	https://doi.org/10.1021/acsami.8b19051
State	Published - 30 Jan 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
Copyright © 2018 American Chemical Society.

Funding

This work was partially supported by various funding agencies of Government of India with sanction no.: (DBT) BT/ PR16620/NER/95/223/2015, (MeitY) 5(1)/2017-NANO, (DST) DST/NM/NNetRA/2018(G)-IIT-KGP. The authors also acknowledge the support provided by the XPS facility in the Department of Physics and other facilities used in Central Research Facilities (CRF), IIT Kharagpur, India.

Funders	Funder number
Department of Biotechnology, Ministry of Science and Technology, India	BT/ PR16620/NER/95/223/2015
Ministry of Electronics and Information technology	DST/NM/NNetRA/2018(G)-IIT-KGP

Keywords

electronic skin
flexible sensors
healthcare sensors
low-power OFETs
organic field-effect transistors
temperature sensors

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10.1021/acsami.8b19051

Cite this

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title = "Organic Field-Effect Transistor-Based Ultrafast, Flexible, Physiological-Temperature Sensors with Hexagonal Barium Titanate Nanocrystals in Amorphous Matrix as Sensing Material",

abstract = "Organic field-effect transistors (OFETs) with hexagonal barium titanate nanocrystals (h-BTNCs) in amorphous matrix as one of the bilayer dielectric systems have been fabricated on a highly flexible 10 μm thick poly(ethylene terephthalate) substrate. The device current and mobility remain constant up to a bending radius of 4 mm, which makes the substrate suitable for wearable e-skin applications. h-BTNC films are found to be highly temperature-sensitive, and the OFETs designed based on this material showed ultraprecision measurement (∼4.3 mK), low power (∼1 μW at 1.2 V operating voltage), and ultrafast response (∼24 ms) in sensing temperature over a range of 20-45 °C continuously. The sensors are highly stable around body temperature and work at various extreme conditions, such as under water and in solutions of different pH values and various salt concentrations. These properties make this sensor unique and highly suitable for various healthcare and other applications, wherein a small variation of temperature around this temperature range is required to be measured at an ultrahigh speed.",

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Mandal, S, Banerjee, M, Roy, S, Mandal, A, Ghosh, A, Satpati, B & Goswami, DK 2019, 'Organic Field-Effect Transistor-Based Ultrafast, Flexible, Physiological-Temperature Sensors with Hexagonal Barium Titanate Nanocrystals in Amorphous Matrix as Sensing Material', ACS Applied Materials and Interfaces, vol. 11, no. 4, pp. 4193-4202. https://doi.org/10.1021/acsami.8b19051

Organic Field-Effect Transistor-Based Ultrafast, Flexible, Physiological-Temperature Sensors with Hexagonal Barium Titanate Nanocrystals in Amorphous Matrix as Sensing Material. / Mandal, Suman; Banerjee, Madhuchanda; Roy, Satyajit et al.
In: ACS Applied Materials and Interfaces, Vol. 11, No. 4, 30.01.2019, p. 4193-4202.

Research output: Contribution to journal › Article › peer-review

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Organic Field-Effect Transistor-Based Ultrafast, Flexible, Physiological-Temperature Sensors with Hexagonal Barium Titanate Nanocrystals in Amorphous Matrix as Sensing Material

Abstract

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Keywords

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