JOHN COLLINS

Maxwell Sensors

Research Interests:

• Impedance Based Cell Sensing
• Cell Ensemble Synthesis
• Cell Viscoelastic Study
• Flow Induced Admittance Sensing
• Acoustic Streamming Micromixing
• Microdroplet Sensing and Array
• Nanomolecular Layer of Lipids & Proteins
• Nanoassemblies based on Polyelectrolytes
• Flow Induced Admittance in Nanochannel
• CFD Simulations for Nanochannel

Contact Information :

Journal Publications

• J. Collins, D. Funfschilling, M. Dennin, Langmuir Blodgett films of arachidic acid and nematic liquid crystals: characterization and use in homeotropic alignment, Thin Solid Films, vol. 496, pp. 601-605, 2006

• J. Collins and A.P. Lee, Microfluidic Flow Transducer Based on the Measurement of Electrical Admittance, Lab. Chip, vol. 4, pp. 7-10, 2004

• A. Jaiswal, J. Collins, B. Agricole, P. Delhaes, S. Ravaine, Layer-by-layer self-assembly of Prussian blue colloids, J. Coll. Interface Sci., vol. 261(2), pp. 330-335, 2003

• A. Dhathathreyan and S.J. Collins, Molecular Dynamics Simulation of (Octadecylamino)dihydroxysalicylaldehyde at Air/Water Interface, Langmuir, vol. 18, pp. 928, 2002

• S. J Collins, A Dhathathreyan, T. Ramasami, Anomalous spreading behaviour of polyethyleneglycoldistearate monolayers at air/water interface, Proc. Ind. Acad. Sci.- Chem. Sci., vol. 113(2), pp. 119, 2001

• S J. Collins, A. Dhathathreyan, T. Ramasami, H. Mohwald, Langmuir and Langmuir Blodgett film of octadecylamino dihydroxysalicylaldehyde, Thin Solid Film, vol. 358, pp. 229, 2000

• S. J. Collins, A. Dhathathreyan, T. Ramasami, Phase Transition in Langmuir Films of Octadecylmalonic acid, J. Coll. Interface Sci. vol. 293, pp. 249, 1998

• S. J. Collins, N. L .Mary, G. Radhakrishnan, A. Dhathathreyan, Studies on Spread Monolayers of Derivative of Styrene-Maleic Anhydride Copolymers, J. Chem. Soc. Faraday Trans, vol. 93, pp. 4021, 1997

• A. Dhathatheyan, N. L. Mary, G. Radhakrishnan, S. J. Collins, Langmuir and Langmuir-Blodgett Films of Schiff Base Modified Styrene-Maleic Anhydride Copolymers, Macromolecules, vol. 29, pp. 1827, 1996

• S. J. Collins, G. N. Mahesh, G. Radhakrishnan, A. Dhathathreyan, Effects of spreading solvents on the monolayers of poly(methymethacrylate), Colloids and Surfaces, A: Physicochemical and Engineering Aspect, vol. 95A, pp. 297, 1995

• J. Collins and A.P. Lee, Flow induced admittance spectroscopy: characterization of biochemicals and biomolecules in microfluidics. (Submitted to Lab on a Chip).

• J. Collins, and A.P. Lee, Detection and analysis of ramping of droplet sizes in microfluidics, (Submitted to Microfluidics and Nanofluidics).

Conference Publications

• Electrical impedance based monitoring of viscous drag of living cells. J. Collins and A.P. Lee, IEEE Sensors, Oct 31-Nov 3, 2005, Irvine, California.

• Automated Multiplexed Multidensity Microfluidic (M3) Cell Sensing Based on Electrical Gain measurements, J. Collins, D. Lavigne, Y. Lin, D. Goodman, P. Irwan, A. P. Lee, IEEE EMBS Special Topics Conference on Microtechnologies in Medicine and Biology, May 12-15, 2005, Hawaii.

• Characterization of neural stem cells for cell sorting using flow induced electrical admittance spectra in microfluidics. J. Collins, N.L. Jeon, L. Flanagan, E. Monuki, A. P. Lee, The eighth international Conference on Miniaturised Systems for Chemistry and Life Sciences. MicroTAS 2004, Sept. 26-30, Malmö, Sweden.

• Nanofluidic channel engineering using laminar flow layer-by-layer deposition of polyelectrolytes. J. Collins, D. Goodman, P. Delhaes, A.P. Lee, 3rd Integrated Nanosystems Conference, Sept. 22-25, 2003 Pasadena, California.

• Microfluidic flow transducer based on the measurement of electrical admittance. J. Collins, A. P. Lee, The 2004 UC Systemwide Bioengineering Symposium, June 26-28, 2004, Irvine, California.

• Biochemical, biomolecular and cellular sensing in microfluidics using flow induced admittance spectra. J. Collins, L. Flanagan, N. Jeon, E. Monuki, A.P. Lee, 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, September 1-5, 2004, San Francisco, California.

• Control of Concentration and Volume Gradients in Microfluidic Droplet Arrays for Protein Crystallization Screening. W-C. Chao, J. Collins, S-W. Wang, G.P. Li, M. Bachman, A.P. Lee, 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, September 1-5, 2004, San Francisco, California.

• Detection and analysis of high speed droplet generation in a microfluidic device. J. Collins, A. P. Lee, ASME International Mechanical Engineering Congress and R&D Expo 2004, Nov 13-19, 2004, Anaheim, California.

• Droplet Arrays in Microfluidic Channels for Combinatorial Screening Assays. W-C Chao, J. Collins, M. Bachman, G.P. Li, and A. P. Lee, Hilton Head 2004: A Solid State Sensor, Actuator and Microsystems Workshop, 2004

• Characterization and sorting of neural stem cells in microfluidic devices. A.P. Lee, J. Collins, J.S. Fisher, N. L. Jeon, L. Flanagan, and E. Monuki, Stem Cells: Keystone Symposia. 2004. Keystone Resort, Colorado.

• Optimization of Shear Driven Droplet Generation in a Microfluidic Device. J. Collins, Y-C. Tan, A.P. Lee, ASME International Mechanical Engineering Congress and R&D Expo, 2003, Washington.

• Integrated Microfluidic Processors and Picoliter Droplets for Biomedical Applications. A.P. Lee, Y.C. Tan, J. Collins, International Conference on Computational & Experimental Engineering and Sciences, July 24-29, 2003, Corfu, Greece.

• Design Of Programmable Diffusion Bioassays Based On MHD Microfluidic System. L. Wang, J. Collins, A. P. Lee, 2003 Summer Bioengineering Conference, Florida.

• Controlled Fission of Droplet Emulsions in Bifurcating Microfluidic Channels. Y-C. Tan, J. Collins, and A. P. Lee, Transducers 2003, Boston.

• Monodisperse Droplet Emulsions in Co-flow Microfluidic Channels. Y-C. Tan, J. Collins., and Abraham P. Lee, Micro TAS 2003, Lake Tahoe, California.

• Time dependent interaction of an ionic subphase with a Langmuir monolayers. J. Collins, M. Dennin, Division of Physical Chemistry, 223rd ACS National Meeting, April 7-11, 2002, Orlando, Florida.

• Layer-by-layer multilayers of Prussian Blue Colloids. A.Biswal, J. Collins, B.Agricole, R.Serge, P. Delhaes, Division of Colloid and Surface Chemistry, 223rd ACS National Meeting, April 7-11, 2002, Orlando, Florida.

Pending Patents

• Immunoassay Apparatus and Method Using Electrical Flow-induced Admittance, J. Collins, A.P. Lee, Docket, No. UCIVN-073N

• Automated Multiplexed Multidensity Microfluidic (M3) Cell Monitoring, J. Collins, A.P. Lee, UC Case No. 2005-695-1

Book Chapter

• A. P. Lee, J. Collins, A.V. Lemoff, Multi-Functional Magnetohydrodynamic (MHD) Devices for Micro Total Analysis Systems, Handbook of BioMEMS and Biomedical Nanotechnology: Biomolecular Sensing, Processing and Analysis, Part I: Micro and Nano-scale Biosensors, Kluwer Academic Publishers, Volume IV, Chapter 10.