Dr. Weijia Wen 温维佳

Professor

Department of Physics

Hong Kong University of Science and Technology 

Clear Water Bay,  Kowloon 

Hong Kong

 

Tel: (852)-23587979

Fax: (852)-23581652

Email: phwen@ust.hk

 

Professor Wen's main research interests include soft condensed matter physics, electrorheological (ER) and magnetorheological (MR) fluids, field-induced pattern and structure transitions, micro- and nano-fluidic  controlling, microsphere and nanoparticle fabrications, thin film physics, band gap materials, metamaterials and nonlinear optical materials.

  

 Electrorheological (ER) and Magnetorheological (MR) Fluids 
 

ER fluids denote a class of materials consisting of nanometer to micrometer sized dielectric particles dispersed in a liquid, whose rheological properties are controllable by an external electric field. In particular, they can reversibly transform from a liquid to a solid within one hundredth of a second. While in the solid state (with the electric field applied), the strength of that solid, measured by the yield stress, is the critical parameter that governs the application potential of the ER fluids.

  Smart droplet via ER fluid (Soft Matter)

ER fluid and its application in microfluidics (Annual Review: Fluid Mech.)

Universal Logic Gate by ER fluid (Soft Matter)

Single-phase ER Effect (Soft Matter) 

Micro-mechanism of ER Fluid (Phys. Rev. Lett.)

Electrorheological Fluid Dynamics (Phys. Rev. Lett.)

Review Article for ER fluid (Soft matter)

The Giant Electrorheological Effect  (Nature Materials)

The yield stress of nanoparticles-based ER fluid is more than 250 kPa  (Appl. Phys. Lett)

Dielectric Electrorheological Fluids: Theory and Experiment  (Advances in Physics)

Frequency Dependence of the ER Effect and the Role of Water  (Phys. Rev. Lett.)

The Ground State of the MR Fluids  (Phys. Rev. Lett.)

Field-Induced Structural Transition from BCT to FCC in EMR Fluid  (Phys. Rev. Lett.)