Abstract:
Multifunctional sensors responding to different
chemical stimuli fabricated using functional nanomaterials still
remain a challenge because of the usage of the same sensor multiple
times for different sensing applications and unreliable front-end
processing of the sensing data. This challenge is intensified by the
lack of suitable techniques for fabricating disposable sensors, which
can be integrated into smartphones with a dedicated application
developed for each sensing application. A novel MoS2/Cu2S hybrid
grown on disposable cellulose paper by the hydrothermal method
is reported for its utilization in sensing humidity, temperature,
breath, and ethanol adulteration, wherein the data can be wirelessly
transmitted to a smartphone with the dedicated application module
for each sensing application. The sensor can be utilized for a
particular sensing application and then can be disposed, avoiding
the need for utilizing the same sensor for different sensing applications, thereby increasing the accuracy of the sensing data. The
sensing mechanism of the fabricated sensor is explained for each stimulus in terms of change in the transport properties of the
MoS2/Cu2S hybrid. The development of such unique hybrid materials for wireless disposable multifunctional sensors is a great
step ahead in flexible and wearable electronics having potential applications in medical, security, Internet of things, etc.
