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This talk will summarize some of our recent results on novel meso-fabrication techniques and the resultantfunctionalities and applications of micro/nano polymeric and carbon structures in environmental remediation, energystorage devices and MEMS. The major emphasis is to produce functional structures and interfaces by self-organizationwith applications that range from microfluidics, micro-batteries, tissue scaffolds to the bulk-nano materials for opticaland functional coatings, bio-mimetic adhesives, super-wetting and structural colors.
Selected Recent References:
1. Multi-scale Carbon MEMS: C. S. Sharma, A. Verma, M. M. Kulkarni, D. Upadhyay and A. Sharma, Microfabricationof carbon structures by pattern miniaturization in resorcinol-formaldehyde Gel, ACS App. Mater. Interf. 2,2193 (2010); Multiscale carbon structures fabricated by direct micro-patterning of electrospun mats of SU-8 photoresistnanofibers, Langmuir 26, 2218 (2010);Controlling the morphology of resorcinol-formaldehyde based carbon xerogelsby sol concentration, shearing and surfactants, Ind. & Eng. Chem. Res. 48, 8030 (2009); Synthesis of resorcinolformaldehydebased carbon xerogel particles and fractal-like structures, Chem. Eng. Sci. 64, 1536 (2009).
2. Environment: Fe-grown carbon nanofibers for removal of arsenic (V) in wastewater, Ind. & Eng. Chem. Res. 49,7074(2010); Adsorptive removal of fluoride by micro-nano hierarchal web of activated carbon fibers, Ind. & Eng. Chem.Res. 48, 9697 (2009); Micro-nano hierarchal web of activated carbon fibers for catalytic gas adsorption and reaction,Ind. & Eng. Chem. Res. 47, 3700 (2008).
3. Fabrication: Enhanced self-organized dewetting of ultrathin polymer films under water-organic solutions: fabricationof sub-micron spherical lens arrays, Advanced Materials (in press, 2010).DOI: 10.1002/adma.201002768; Multiscalepattern generation in viscoelastic polymer films by spatio-temporal modulation of electric field and control of rheology,Advanced Functional Materials (in press, 2010).DOI: 10.1002/adfm.201001206; Stability and dewetting of metalnanoparticles filled thin polymer films: control of instability length-scale and dynamics, ACS Nano 4, 3709 (2010);Templated one step electrodeposition of high aspect ratio n-type ZnO nanowire arrays, J. Colloid Interface Sci. 344, 1(2010); Electric field induced patterns in soft visco-elastic films: from long waves of viscous liquids to short waves ofelastic solids, Phys. Rev. Lett. 102, 254502 (2009).
4. Bio-Mimic: Micro-fluidic adhesion induced by sub-surface micro-structures, Science, 318, 258-261 (2007); Abioinspired wet/dry microfluidic adhesive for aqueous environments, Langmuir, 26, 521 (2010).
Acknowledgments
Collaboratorations with Marc Madou (UCI), Nishith Verma (IITK), Manoj Chaudhury (Lehigh), Animangsu Ghatak (IITK),
K. S. Narayan (JNCASR) and Rabi Mukherjee (IITKgp) are gratefully acknowledged.
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