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Dive into the research topics where Avanish Mishra is active.

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Featured researches published by Avanish Mishra.


Trends in Biotechnology | 2014

Optoelectrical microfluidics as a promising tool in biology

Avanish Mishra; Jae-Sung Kwon; Raviraj Thakur; Steven T. Wereley

Noncontact robotic particle grippers with trapping, manipulation, and release functions are highly desired in cell biology and microfluidics. Optoelectric techniques combine optical and electrokinetic effects to create thousands of such individually addressable traps. By projecting reconfigurable light patterns, these techniques can concentrate molecules, as well as manipulate, sort, and electroporate cells in a programmable manner. We describe the underlying physical mechanisms and discuss applications in biology and future prospects of these devices.


Microsystems & Nanoengineering | 2016

Dynamic optoelectric trapping and deposition of multiwalled carbon nanotubes

Avanish Mishra; Katherine Noel Clayton; Vanessa Velasco; Stuart J. Williams; Steven T. Wereley

In the path toward the realization of carbon nanotube (CNT)-driven electronics and sensors, the ability to precisely position CNTs at well-defined locations remains a significant roadblock. Highly complex CNT-based bottom–up structures can be synthesized if there is a method to accurately trap and place these nanotubes. In this study, we demonstrate that the rapid electrokinetic patterning (REP) technique can accomplish these tasks. By using laser-induced alternating current (AC) electrothermal flow and particle–electrode forces, REP can collect and maneuver a wide range of vertically aligned multiwalled CNTs (from a single nanotube to over 100 nanotubes) on an electrode surface. In addition, these trapped nanotubes can be electrophoretically deposited at any desired location onto the electrode surface. Apart from active control of the position of these deposited nanotubes, the number of CNTs in a REP trap can also be dynamically tuned by changing the AC frequency or by adjusting the concentration of the dispersed nanotubes. On the basis of a calculation of the stiffness of the REP trap, we found an upper limit of the manipulation speed, beyond which CNTs fall out of the REP trap. This peak manipulation speed is found to be dependent on the electrothermal flow velocity, which can be varied by changing the strength of the AC electric field.


Electrophoresis | 2016

Optoelectric patterning: Effect of electrode material and thickness on laser-induced AC electrothermal flow

Avanish Mishra; Jian-Wei Khor; Katherine Noel Clayton; Stuart J. Williams; Xudong Pan; Tamara L. Kinzer-Ursem; Steve Wereley

Rapid electrokinetic patterning (REP) is an emerging optoelectric technique that takes advantage of laser‐induced AC electrothermal flow and particle‐electrode interactions to trap and translate particles. The electrothermal flow in REP is driven by the temperature rise induced by the laser absorption in the thin electrode layer. In previous REP applications 350–700 nm indium tin oxide (ITO) layers have been used as electrodes. In this study, we show that ITO is an inefficient electrode choice as more than 92% of the irradiated laser on the ITO electrodes is transmitted without absorption. Using theoretical, computational, and experimental approaches, we demonstrate that for a given laser power the temperature rise is controlled by both the electrode material and its thickness. A 25‐nm thick Ti electrode creates an electrothermal flow of the same speed as a 700‐nm thick ITO electrode while requiring only 14% of the laser power used by ITO. These results represent an important step in the design of low‐cost portable REP systems by lowering the material cost and power consumption of the system.


ACS Nano | 2014

Photothermal Heating Enabled by Plasmonic Nanostructures for Electrokinetic Manipulation and Sorting of Particles

Justus C. Ndukaife; Avanish Mishra; Urcan Guler; A. G. Agwu Nnanna; Steven T. Wereley; Alexandra Boltasseva


Lab on a Chip | 2016

Trapping and viability of swimming bacteria in an optoelectric trap

Avanish Mishra; Thora R. Maltais; Tom Walter; Alexander Wei; Stuart J. Williams; Steve Wereley


Soft Matter | 2015

Mapping surface tension induced menisci with application to tensiometry and refractometry

Avanish Mishra; Varun Kulkarni; Jian-Wei Khor; Steve Wereley


Archive | 2016

Effect of Particle Concentration and AC Electric Field Strength on Particle Trapping in Rapid Electrokinetic Patterning (REP)

Sixuan Li; Avanish Mishra; Steve Wereley


Bulletin of the American Physical Society | 2016

Programmed assembly of colloidal arrays using shaped microvortices

Avanish Mishra; Aloke Kumar; Steven T. Wereley


Bulletin of the American Physical Society | 2015

Broadband light based optoelectric tweezers

Avanish Mishra; Katherine Noel Clayton; Steve Wereley


conference on lasers and electro optics | 2014

Photothermal heating enabled by plasmonic nanoantennas for electrokinetic manipulation and sorting of submicron particles

Justus C. Ndukaife; Avanish Mishra; Urcan Guler; A. G. Agwu Nnanna; Steve Wereley; Alexandra Boltasseva

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