title: Transparent Pd Wire Network-Based Areal Hydrogen Sensor with Inherent Joule Heater.
abstract: A high degree of transparency in devices is considered highly desirable for futuristic technology. This demands that both the active material and the electrodes are made of transparent materials. In this work, a transparent Pd wire network (∼1 cm(2)), fabricated using crackle lithography technique with sheet resistance and transmittance of ∼200 Ohm per square and ∼80%, respectively, serves multiple roles; besides being an electrode, it acts as an active material for H2 sensing as well as an in-built electrothermal heater. The sensor works over a wide range of hydrogen (H2) concentration down to 0.02% with a response time of ∼41 s, which could be improved to ∼13 s by in situ Joule heating to ∼75 °C. Importantly, the device has the potential of scale-up to a window size transparent panel and to be flexible when desired.
authors.affiliation: Chemistry & Physics of Materials Unit and Thematic Unit of Excellence in Nanochemistry, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bengaluru 560064, India.|Centre for Nano and Soft Matter Sciences (CeNS) , Jalahalli, Bengaluru 560013, India.
authors.forename: Sunil
authors.initials: S
authors.lastname: Walia
authors.affiliation: Department of Chemistry, Indian Institute of Technology Jodhpur , Jodhpur, Rajasthan 342011, India.
authors.forename: Ritu
authors.initials: R
authors.lastname: Gupta
authors.affiliation: Chemistry & Physics of Materials Unit and Thematic Unit of Excellence in Nanochemistry, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bengaluru 560064, India.
authors.forename: K D M
authors.initials: KD
authors.lastname: Rao
authors.affiliation: Centre for Nano and Soft Matter Sciences (CeNS) , Jalahalli, Bengaluru 560013, India.
authors.forename: Giridhar U
authors.initials: GU
authors.lastname: Kulkarni
keywords: Joule heating; flexible; gas sensor; hydrogen; transparent heater