Retracted: Highly Sensitive MoS₂ Humidity Sensors Array for Noncontact Sensation

Abstract

Recently, 2D materials exhibit great potential for humidity sensing applications due to the fact that almost all atoms are at the surface. Therefore, the quality of the material surface becomes the key point for sensitive perception. This study reports an integrated, highly sensitive humidity sensors array based on large-area, uniform single-layer molybdenum disulfide with an ultraclean surface. Device mobilities and on/off ratios decrease linearly with the relative humidity varying from 0% to 35%, leading to a high sensitivity of more than 10 . The reversible water physisorption process leads to short response and decay times. In addition, the device array on a flexible substrate shows stable performance, suggesting great potential in future noncontact interface localization applications.

Sponsored Collection | Humble Beginning, Bright Future: Institute of Physics (CAS) at 90

“…Zhang's group explored various 2D material-based nanodevices for electronic applications, such as graphene nanoelectromechanical system (NEMS) switch devices, ultrasensitive graphene strain sensors and electronic skin, graphene-based charge-trapping memories, and graphene nanogap multilevel memristor devices (38)(39)(40)(41)(42)(43)(44)(45)(46). They also demonstrated highly sensitive humidity sensors based on monolayer MoS 2 films with clean surfaces.…”

Flexible Smart Noncontact Control Systems with Ultrasensitive Humidity Sensors

“…For example, GO‐based humidity sensor was unstable and susceptible to environmental influences . The high gate operating voltage of 80 V and complicated preparation process were required in the recently reported humidity sensor based on 2D‐MoS 2 field effect transistor, which increases the power consumption and fabrication cost . A VS 2 ‐based humidity sensor was also reported but suffered from low sensitivity and slow response .…”

“…In addition, the sensor also has fast response (<0.4 s) and recovery (<2 s) over the full RH range (0–100%) (Figure S3, Supporting Information). Different types of humidity sensors have been compared in Table S2 (Supporting Information), showing that our sensors have much surpassed the reported humidity sensors in terms of the sensitivity, speed, and detection range . In addition, we compared the state‐of‐the‐art commercial humidity sensors (such as Sensirion SHT35, Humidlcon HIH7000, TE HM1500LF) with our work in terms of detection range, sensitivity, accuracy tolerance, flexibility, transparency, and noncontact control applications.…”

A High Stretchable and Self–Healing Silicone Rubber with Double Reversible Bonds

“…Artificial skin–like electronics have been developed to mimic various characteristics of human skin such as sensing pressure, strain, temperature and humidity and are expected to be widely used in soft robotics, wearable devices, electronic skin, and artificial intelligence . Recently, the concept of self–healing has been introduced into flexible devices .…”