Hashemi Lab           Iowa State University  
       
         Bio Microfluidics and
Optofluidic System
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Available Positions
We are currently seeking highly motivated PhD students to conduct research in our laboratory. For research topic areas, see Reresearch page. Interested students should contact Professor Hashemi via email with the following information:
- Resume / Curriculum Vitae
- References (names & email addresses of 3 people for whom you have worked)
Graduate students with scholraship/fellowship support are encouraged to include this information in their email.


Invited to deliver a keynote presentation at the ASME ICNMM 2014
Nastaran Hashemi is invited to deliver a keynote presentation at theNastaran ASME 2014 Joint US-European Fluids Engineering Division Summer Meeting and the International Conference on Nanochannels, Microchannels, and Minichannels. (Keynote presentation at the ASME)



     
  actuator  Study of Physically Transient Insulating Materials as a Potential Platform for Transient Electronics and Bioelectronics jmccfig
Research Interests    Catherine Meis Published in the Journal of Applied Physics      
 
Microfluidics
Biosensors
Optofluidics
Renewable Energy
Materials
Lab on a Chip
Diagnostics and Therapeutics
Physics of Micro/Nanoscale Phenomena
Nonlinear Dynamics

At the Hashemi Lab, we are working on projects concerned with the design and fabrication of microfluidic/optofluidic devices with applications to clinical diagnosis, renewable energy, and environmental monitoring.

Our primary research objective is to understand how microfluidic transport could provide a fundamental science base for novel fabrication of polymer microfibers with controlled size, shape, and molecular alignment. Computational fluid dynamics and experimental techniques will be employed to design and study characteristics of highly structured microfibers.

Also, hydrodynamic focusing of one laminar stream by another has inspired new approaches in biosensors and cell analysis. We have devised a novel system to ensheathe, focus, and separate the sample stream from the sheath streams. Using grooves at very specific orientations in the upper and lower surfaces of the microchannel, the sheath fluid is directed around the sample stream in the microflow cytometer. The dynamics of fluid flow can be reversed by reversing the direction of the forces applied to the system at low Reynolds number. Integrating the concept of “unstirring” into the groove-based sheath flow system by placing reverse grooves in the channel pointing upstream, the sample stream is separated from the contiguous sheath streams. The unsheathing capability provides the opportunity to recover particles from the sensor with minimal dilution or to recycle the sheath fluid for long-term unattended operation.
cells     Adult Hippocampal Progenitor Cells Growing on PCL Microfibers

    optofluidics

     Optofluidic Cytometry on a Chip
  It’s not typical for undergraduates to have work published as more than supporting authors, but Meis said she was fortunate enough to be the first author on the paper accepted by the Journal of Applied Physics. Reza Montazami and Nastaran Hashemi, both assistant professors of mechanical engineering, are Meis’ research mentors and authors on the paper.“My mentors were instrumental in guiding the research project and helping me write the paper,” she said.

On-Chip Development of Hydrogel Microfibers from Round to Square/Ribbon-Shaped

microfibers
Our hydrogel microfibers manuscript has been published in the Journal of Materials Chemistry A. We use a microfluidic approach to fabricate gelatin microfibers with controlled sizes and cross sections.




Hashemi invited to attend NAS symposium
Nastaran Hashemi, William March Scholar in Mechanical Engineering and assistant professor, has been invited to attend the National Academy of Sciences Indo-American Frontiers in Science, being held April 7-10, in Agra, India. The symposium is designed to create a collaborative environment by bringing together outstanding young scientists from diverse disciplines to share their research.
(
NAS invitation release)

Hashemi receives NRC/ASEE research publication award for optofluidic approach

Nastaran Hashemi, William March Scholar in Mechanical Engineering, was chosen to receive the 2011 Naval Research Laboratory NRC/ASEE Research Publication Award for her paper “Optofluidic characterization of marine algae using a microflow cytometer.” (Hashemi publication award release)

 hashemi

Pursuing New Ideasbirutawit
Being the William March Scholar in Mechanical Engineering at Iowa State University is much more than just a prestigious title. Nastaran Hashemi was named the latest March Scholar this past fall, and she has hit the ground running with the funding that the award provides her. (Full story)

     
             
             

nastaran@iastate.edu
2028 Black Engineering Building