Nanowell-patterned TiO2 microcantilevers for calorimetric chemical sensing

Dongkyu Lee; Seonghwan Kim; Inseok Chae; Sangmin Jeon; Thomas Thundat

doi:10.1063/1.4870535

Nanowell-patterned TiO₂ microcantilevers for calorimetric chemical sensing

Dongkyu Lee
, Seonghwan Kim
, Inseok Chae
, Sangmin Jeon
, Thomas Thundat

Department of Chemical and Biological Engineering

University at Buffalo

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

12 Scopus citations

Abstract

A sensitive calorimetric sensor using a TiO₂ microcantilever with nanowells patterned on one of its sides is described. This single material cantilever is sensitive to temperature change without relying on the metal deposition-based bimetallic effect. The thermomechanical sensitivity originates from the structure dependent variations in both the elastic modulus and thermal expansion coefficient due to the presence of ordered nanowells. These cantilever beams offer an alternate and efficient chemical sensing route for vapor phase analytes using photothermal spectroscopy. Selective and sensitive detection of organophosphorus compounds, as well as their photocatalytic decomposition under ultraviolet light exposure are demonstrated.

Original language	English
Article number	141903
Journal	Applied Physics Letters
Volume	104
Issue number	14
DOIs	https://doi.org/10.1063/1.4870535
State	Published - Apr 7 2014

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abstract = "A sensitive calorimetric sensor using a TiO2 microcantilever with nanowells patterned on one of its sides is described. This single material cantilever is sensitive to temperature change without relying on the metal deposition-based bimetallic effect. The thermomechanical sensitivity originates from the structure dependent variations in both the elastic modulus and thermal expansion coefficient due to the presence of ordered nanowells. These cantilever beams offer an alternate and efficient chemical sensing route for vapor phase analytes using photothermal spectroscopy. Selective and sensitive detection of organophosphorus compounds, as well as their photocatalytic decomposition under ultraviolet light exposure are demonstrated.",

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AU - Lee, Dongkyu

AU - Kim, Seonghwan

AU - Chae, Inseok

AU - Jeon, Sangmin

AU - Thundat, Thomas

PY - 2014/4/7

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N2 - A sensitive calorimetric sensor using a TiO2 microcantilever with nanowells patterned on one of its sides is described. This single material cantilever is sensitive to temperature change without relying on the metal deposition-based bimetallic effect. The thermomechanical sensitivity originates from the structure dependent variations in both the elastic modulus and thermal expansion coefficient due to the presence of ordered nanowells. These cantilever beams offer an alternate and efficient chemical sensing route for vapor phase analytes using photothermal spectroscopy. Selective and sensitive detection of organophosphorus compounds, as well as their photocatalytic decomposition under ultraviolet light exposure are demonstrated.

AB - A sensitive calorimetric sensor using a TiO2 microcantilever with nanowells patterned on one of its sides is described. This single material cantilever is sensitive to temperature change without relying on the metal deposition-based bimetallic effect. The thermomechanical sensitivity originates from the structure dependent variations in both the elastic modulus and thermal expansion coefficient due to the presence of ordered nanowells. These cantilever beams offer an alternate and efficient chemical sensing route for vapor phase analytes using photothermal spectroscopy. Selective and sensitive detection of organophosphorus compounds, as well as their photocatalytic decomposition under ultraviolet light exposure are demonstrated.

UR - https://www.scopus.com/pages/publications/84899008339

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Nanowell-patterned TiO₂ microcantilevers for calorimetric chemical sensing

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