Droplet Based Microfluidics (DBMF)

Sangam Srikanth || Leela Kishan || Badar Ali

Applications: Rheology, Bio-particle Encapsulation

a) Schematic of the Direct UV-Laser Writing system b) Repeatability in dimensions after development c) Scanning Electron Microscopy images

Fabrication of Microscale Geometries using DLW System

UV Direct Laser Writing (DLW) system optimized for obtaining various geometries
Parameters affecting width identified
Microchannels with a minimum width of 30 µm fabricated
Advantages of the System:
- High Resolution and Repeatability.
- Cleanroom Free
- Economical, Time Saving Method

Parametric study on Droplet Generation in µ-fluidic Channels

Droplet Generation in a Flow Focusing Junction
Parametric Study on droplet sizes
Advantages
- Microdroplets of smaller volumes
- High frequency droplet Generation
- Monodisperse droplet generation

a) Experimental setup depicting the microfluidic droplet generator b) Droplet breakup process c) Droplets obtained of various sizes

Related Publications

Journal Publications

5. Sangam Srikanth, Sushil Raut, Satish Kumar Dubey, Idaku Ishii, Arshad Javed and Sanket Goel, Experimental Studies on Droplet Characteristics in a Microfluidic Flow Focusing Droplet Generator: Effect of Continuous Phase on Droplet Encapsulation, The European Physical Journal E, vol. 44, 108, 2021.

4. Sangam Srikanth, Sohan Dudala, Jayapiriya US, J Murali Mohan, Sushil Raut, Satish Kumar Dubey, Idaku Ishii, Arshad Javed and Sanket Goel, Droplet-based lab-on-chip platform integrated with laser ablated graphene heaters to synthesize gold nanoparticles for electrochemical sensing and fuel cell applications, Scientific Reports, vol. 11, #9750, 2021.

3. Sangam Srikanth, Jaligam Murali Mohan, Sushil Raut, Satish Kumar Dubey, Idaku Ishii, Arshad Javed and Sanket Goel, Droplet Based Microfluidic Device Integrated with Ink Jet Printed Three Electrode System for Electrochemical Detection of Ascorbic Acid, Sensors and Actuators: A. Physical, vol. 325, 112685, 2021.

2. Sangam Srikanth, Sohan Dudala, Sushil Raut, Satish Kumar Dubey, Idaku Ishii, Arshad Javed and Sanket Goel, Optimization and Characterization of Direct UV Laser Writing System for Microscale Applications, Journal of Micromechanics and Microengineering, vol, 30(9), 095003 (15pp), 2020.

1. Sangam Srikanth, J. M. Mohan, S. Dudala, S. K. Dubey, A. Javed, and S. Goel, Direct UV laser writing system to photolithographically fabricate optimal microfluidic geometries: Experimental investigations. Mater. Today Proc., Jan. 2020, doi: 10.1016/j.matpr.2019.12.301.

Conference Publications

2. Sangam Srikanth, Satish Kumar Dubey, Arshad Javed and Sanket Goel, Droplet Based Microfluidic Electrochemical Detection of Uric Acid, Ascorbic Acid and Dopamine, presented at ECS PRiME 2020, to be held during Oct 2020.

1. Sangam Srikanth, J. M. Mohan, S. Dudala, S. K. Dubey, A. Javed, and S. Goel, Direct UV laser writing system to photolithographically fabricate optimal microfluidic geometries: Experimental investigations. 2nd International Conference on Recent Advances in Materials & Manufacturing Technologies, 2019, Dubai.

Under Review

1. Sangam Srikanth, Jayapiriya U S, Satish Kumar Dubey, Arshad Javed and Sanket Goel, Development of Laser Induced Graphene Electrodes over Negative Photoresist for various Glass-based Lab-on-a-Chip Applications, under review.