4.6 Article

All-cellulose-derived humidity sensor prepared via direct laser writing of conductive and moisture-stable electrodes on TEMPO-oxidized cellulose paper

Journal

JOURNAL OF MATERIALS CHEMISTRY C
Volume 10, Issue 10, Pages 3712-3719

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc05339f

Keywords

-

Funding

  1. Nanotechnology Platform Project (Nanotechnology Open Facilities in Osaka University) from the Ministry of Education, Culture, Sports, Science and Technology, Japan [JPMXP09S21OS0029]
  2. JST FOREST Program [JPMJFR2003]
  3. Japan Prize Heisei Memorial Research Grant Program
  4. [JP20J11624]

Ask authors/readers for more resources

Humidity sensing is important in various fields such as agriculture, healthcare, skincare, and environmental monitoring. This study demonstrates the development of an all-cellulose-derived humidity sensor using renewable cellulose as the humidity-sensing material, which exhibits high sensitivity and wide applicability.
Humidity sensing plays an important role in diverse applications in the fields of agriculture, healthcare, skincare, and environmental monitoring. With the advent of the trillion sensor society, there is a growing demand for humidity sensors that can be made from abundant and renewable resources. Cellulose, the most abundant and renewable bioresource on Earth, acts as a humidity-sensing material because of its hydrophilic nature. However, non-renewable noble metal electrodes are still indispensable because good electrical conductivity and moisture stability are necessary for reliably detecting electrical signals from cellulose-based humidity-sensing materials. Herein, we demonstrate the direct CO2-laser writing of electrodes onto TEMPO-oxidized cellulose paper to realize an all-cellulose-derived humidity sensor. The TEMPO-oxidized cellulose paper with sodium carboxylate groups provides a satisfactory humidity-sensing performance and is converted to conductive and moisture-stable electrodes directly via laser-induced carbonization. The resulting all-cellulose-derived humidity sensor demonstrates high sensitivity and linearity over a wide range of relative humidity (11-98%), thereby providing broad applicability. The sensor can be used for the positional localization of moist objects and for monitoring plant transpiration and human-body sweating. These results open the door for renewable and sustainable humidity sensors.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available