Ultrahigh humidity sensitivity of graphene oxide

By H. Bi, K. Yin, Xiao Xie, Jing Ji, Shu Wan, Litao Sun, Mauricio Terrones, Mildred S. Dresselhaus. Scientific Reports, 2013

663 citations recorded by the source corpus.

Humidity sensors have been extensively used in various fields and numerous problems are encountered when using humidity sensors, including low sensitivity, long response and recovery times and narrow humidity detection ranges. Using graphene oxide (G-O) films as humidity sensing materials, we fabricate here a microscale capacitive humidity sensor. Compared with conventional capacitive humidity sensors, the G-O based humidity sensor has a sensitivity of up to 37800% which is more than 10 times higher than that of the best one among conventional sensors at 15%–95% relative humidity. Moreover, our humidity sensor shows a fast response time (less than 1/4 of that of the conventional one) and recovery time (less than 1/2 of that of the conventional one). Therefore, G-O appears to be an ideal material for constructing humidity sensors with ultrahigh sensitivity for widespread applications.

Subfields: Bioengineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3a54675ff58807e031b08e43a857a9ffbe4e5aa4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

1. V. Mittal

In Materials Chemistry

1. Olga Kazakova
2. Sundaram Swaminathan
3. K. Singh
4. S. H. Varghese
5. V. Mittal
6. C. Melios
7. V. Panchal
8. C. Giusca

Citations in the corpus

• Transparent, stretchable, and rapid-response humidity sensor for body-attachable wearable electronics (2017, neutral): “Although humidity sensors based on graphene materials such as CVD-Gr-based humidity sensors [23] and GO-based humidity sensors [27, 28], exhibit a high responsivity [27], and fast response and relaxation time [23, 28], they still have limited stretchability.”
• Flexible Sensors—From Materials to Applications (2019, methodology): “Capacitive humidity sensors were commonly fabricated using graphene [483,484], hydrophilic polytetrafluoroethylene (H-PTFE) [485], Cr/Au [339], and AgNP [339].”
• Two-Dimensional Materials for Sensing: Graphene and Beyond (2015, background): “GO has proved to be the best suitable material for humidity sensing applications with ultrahigh sensitivity [59].”
• Water on graphene: review of recent progress (2018, methodology): “An alternative design for GO humidity sensor was demonstrated by Bi et al [82].”