Short Communication

Microfluidics and Nanofluidics

, Volume 7, Issue 1, pp 141-144

First online:

Temperature sensor using ferrofluid thin film

  • Dongchen ZhangAffiliated withDepartment of Physics, The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University
  • , Ziyun DiAffiliated withDepartment of Physics, The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University
  • , Yun ZouAffiliated withDepartment of Physics, The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University
  • , Xianfeng ChenAffiliated withDepartment of Physics, The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University Email author 

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Abstract

A brand new design of temperature sensor using ferrofluid thin film is proposed in this paper. When magnetic field parallel to the plane of the ferrofluid thin film is applied, magnetic chains form in the same direction of the magnetic field, which results in the suppressing of optical transmission. It is observed that the optical transmission is changed by the ambient temperature, so that temperature sensor can be constructed by measuring the transmission power of a laser. The physics and the sensitivity of the temperature sensor are also analyzed.

Keywords

Temperature sensor Ferrofluid Magnetic chains Optical transmission Sensitivity