Nanoscale Thermal Management of Single SnO2 Nanowire: pico-Joule Energy Consumed Molecule Sensor

作者：Meng Gang; Zhuge Fuwei; Nagashima Kazuki; Nakao Atsuo; Kanai Masaki; He Yong; Boudot Mickael; Takahashi Tsunaki; Uchida Ken; Yanagida Takeshi

来源：ACS Sensors, 2016, 1(8): 997-1002.

DOI：10.1021/acssensors.6b00364

• nanoscale thermal management
• single nanowire device
• pulse measurement
• thermal relaxation time
• thermal conductivity
• flexible device

Here we report the thermal management of oxide nanowire sensor in both spatial and time domains by utilizing unique thermal properties of nanowires, which are (1) the reduced thermal conductivity and (2) the short thermal relaxation time down to several microseconds. Our method utilizes a pulsed self-Joule-heating of suspended SnO2 nanowire device, which enables not only the gigantic reduction of energy consumption down to similar to 10(2) pJ/s, but also enhancement of the sensitivity for electrical sensing of NO2 (100 ppb). Furthermore, we demonstrate the applicability of the present method as sensors on flexible PEN substrate. Thus, this proposed thermal management concept of nanowires in both spatial and time domains offers a strategy for exploring novel functionalities of nanowire-based devices.

• 出版日期2016-8