Colloidal Assembly

Research Description

The group has performed extensive work in using electric and magnetic fields as a tool for on-chip assembly and manipulation of nanoparticles, microparticles, and live cells. Their research has been among the first to focus on Janus, patchy and cubic metallodielectric particles.A new AC-electrokinetic mobility mode of Janus metallodielectric particles was discovered. Means to form percolated networks by induced multipolar interactions hold promise for numerous new materials.

Current Projects

Magnetically Responsive and Self-Repairing Gels Natasha Castellanos

Previous Projects

Electric-Field-Assisted Convective Assembly of Colloidal Crystal Coatings Jairus Kleinert

Reconfigurable Assemblies of Particles by Magnetic Fields Stoyan Smoukov & Sumit Gangwal

Nanoscale Directed Self-Assembly in Electrical Fields Sumit Gangwal

Making New SERS Materials Daniel Kuncicky

Convective Assembly of Antireflective Silica Coatings Yeon Hwang

Control and Modeling of the Dielectrophoretic Assembly of On-chip Nanoparticle Wires Ketan Bhatt

Controlled Deposition and Modification of Structured Colloidal Coatings Brian Prevo

Representative Publications

Morales, D.; Bharti, B.; Dickey, M.D.; Velev, O.D. Bending of Responsive Hydrogel Sheets Guided by Field-Assembled Microparticle Endoskeleton Structures. Small 2016.

Bharti, B.; Velev, O. D. Assembly of Reconfigurable Colloidal Structures by Multidirectional Field-Induced Interactions. Langmuir 2015, 31, 7897.

Bharti, B.; Findenegg, G.H.; Velev, O. D. Analysis of the Field-Assisted Permanent Assembly of Oppositely Charged Particles. Langmuir 2014, 30, 6577-6587.

Bharti, B.; Findenegg, G. H.; Velev, O. D. Co-assembly of oppositely charged particles into linear clusters and chains of controllable length. Sci. Rep. (Nature) 2012, 2, 1004(1-4).

Brandy, M.L.; Cayre, O.J.; Fakhrullin, R.F.; Velev, O.D.; Paunov, V.N. Directed assembly of yeast cells into living celloidosomes by bubble templating. Soft Matter 2010, 6, 3494–3498.

Smoukov, S. K.; Gangwal, S.; Marquez, M.; Velev, O. D. Reconfigurable responsive structures assembled from magnetic Janus particles. Soft Matter2009, 5, 1285–1292.

LGangwal, S.; Cayre, O. J.; Velev, O. D. Dielectrophoretic assembly of metallodielectric Janus particles in AC electric fields. Langmuir 2008, 24, 13312–13320.

Velev, O. D.; Bhatt, K. H. On-chip micromanipulation and assembly of colloidal particles by electric fields. Soft Matter 2006, 2, 738–750.