Dr. Qiuni Zhao Profile

Dr. Qiuni Zhao

at Univ. of Electronic Science and Technology of China

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 December 2020 Paper

Drawn a flexible, low-cost, eco-friendly, and multifunctional humidity sensor on paper using carbon ink

Zaihua Duan, Yadong Jiang, Si Wang, Qiuni Zhao, Yajie Zhang, Zhen Yuan, Huiling Tai

Proceedings Volume 11617, 1161715 (2020) https://doi.org/10.1117/12.2585014

Read Abstract +

Paper is known to have good flexible and hydrophilic characteristics, making it a potential candidate material to fabricate flexible humidity sensor. The key technology for fabricating paper-based (PB) humidity sensor is to prepare electrodes on the surface of paper. However, the preparation of electrodes on the flexible paper usually involves complex processes and expensive raw materials. In this work, inspired by the traditional writing art with carbon ink, a facile PB humidity sensor is fabricated by drawing the daily available carbon ink on paper as the electrodes. The results show that the PB humidity sensor exhibits an excellent humidity sensing response of more than 1000 as well good linearity (R² = 0.9981) within the humidity range from 18.7% to 91.5% relative humidity (RH). Owing to the good flexibility and fast response rate (~7.5 nA/s, current change rate of the humidity sensor from18.7% to 91.5% RH), endowing the PB humidity sensor has multifunctional applications for breath rate, baby diaper wetting, and vertical space humidity distribution monitoring. Moreover, the PB humidity sensor can be directly disposed by a simple and cost-saving combustion method. This work provides a helpful guidance for the preparation of flexible, low-cost, eco-friendly and multifunctional humidity sensor, and expands the application of daily available carbon ink in the field of electrodes.

Proceedings Article | 4 December 2020 Paper

Ultrathin niobium carbide nanosheets for humidity sensing

Qiuni Zhao, Zaihua Duan, Si Wang, Zhen Yuan, Huiling Tai, Yadong Jiang

Proceedings Volume 11617, 116171J (2020) https://doi.org/10.1117/12.2585164

Read Abstract +

MXene, as a group of prominent two-dimensional (2D) materials, has attracted the attention in the field of sensors due to its large specific surface area, good electronic conductivity and abundant functional groups. In addition to the widely reported titanium carbide (Ti₃C₂T_x), other MXene nanomaterials are gradually developed in recent years. Herein, niobium carbide (Nb₂CT_x) MXene with ultrathin nanosheets is synthesized through the typical liquid-phase exfoliation (hydrofluoric acid) and special delamination (tetrapropylammonium hydroxide) method. The resistive-type humidity sensor prepared by simple dropping coating is tested at room temperature (25 °C). The results show that the resistance variation of the Nb₂CT_x humidity sensor is more than three orders of magnitude within the humidity range from 0 to 91.5 % relative humidity (RH) and the response (recovery) time of the sensor is only 1 s (8 s). Moreover, the Nb₂CT_x humidity sensor exhibits small humidity hysteresis (∼2.5 %RH) and good linearity. Ultrathin Nb2CTx nanosheets provide copious adsorption sites for water molecules, the ionization of physical adsorbed water molecules leads to a rapid decline in resistance. The ultrafast response of Nb₂CT_x sensor is expected to be applied in the field of industry, agriculture and human-respiration humidity monitoring.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years