Ravi Saraf
Professor
Department of Chemical & Biomolecular Engineering
College of Engineering, University of Nebraska–Lincoln
212 OTHM Lincoln NE 68588-0643
rsaraf2@unl.edu

Research Interests:

Electronic Skin: Using tunneling phenomena, we are developing an ~100 nm thin film nanodevice that converts applied pressure to light and electric current. The spatial resolution that images stress is 100-fold better than the current state of the art devices. These devices have pressure sensitivity and resolution to sense texture on a level comparable to a human finger.

Electronics on Bacterium: Using the highly specialized structure of bacterium surface and the physiology of a specified microorganism, we are building an active electronic device made of nanoparticles and nanorods piggybacked on the organism. We have demonstrated our approach and built a humidity sensor with a 10-fold greater sensitivity than current microelectronic devices.

DNA and Protein Chip: Using the fundamental principles of optics, we are developing a novel chip that probes DNA and protein without using any labels. The uniqueness of the design is that it is relatively "blind" to non-specific binding and is quantitatively proportional to percent binding.

Dance of Ions at the Electrode: We have developed a special interferometer to measure ion motion close to the electrode within its ~3 nm thick electric double layer. The highly versatile apparatus is being used to study enzymatic binding reactions, redox processes and ions motion in confined media, i.e., nanopores. Nanomaterials on DNA and Polymer Scaffold: Using DNA and polymers as scaffold we are exploring the construction of long, continuous, electrically conducting nano-wires to use in single electron nanodevices that can easily be wired to form logic circuits.

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2008

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Polyelectrolyte mediated scalable synthesis of highly stable silver nanocubes in less than a minute using microwave irradiation, Subrata Kundu, Vivek C. Maheshwari, Sanjun Niu, and Ravi F. Saraf

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Self-Assembly of a Micrometers-Long One-Dimensional Network of Cemented Au Nanoparticles, Vivek C. Maheshwari, Jennifer Kane, and Ravi F. Saraf

2007

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Selective assembly of nanoparticles on block copolymer by surface modification, Sanjun Niu and Ravi F. Saraf

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Linear Tactile Nanodevice with Resolution on Par with Human Finger, Ravi F. Saraf, Vivek C. Maheshwari, and Chieu Nguyen

2006

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High-Resolution Thin-Film Device to Sense Texture by Touch, Vivek C. Maheshwari and Ravi F. Saraf

Direct Measurement of Ion Accumulation at the Electrode Electrolyte Interface under an Oscillatory Electric Field, Dr.Ravi Saraf

Mineralization of Monodispersed CdS Nanoparticles on Polyelectrolyte Superstructure Forming an Electroluminescent “Necklace-of-Beads”, Dr.Ravi F. Saraf and Vivek Maheshwari

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Means of Seeding and Metallizing Polyimide, Ravi F. Saraf

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Discover Magazine - Cyborg Bacteria, Ravi F. Saraf and Vikas Berry

Robot with the human touch feels just like us- Times online UK- Edition, Ravi Saraf and Vivek Maheshwari

2005

MSNBC - Gold-plated bacteria, Vikas Berry and Ravi Saraf

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Self-Assembly of Nanoparticles on Live Bacterium: An avenue to fabricate Electronic Devices, Vikas Berry and Ravi F. Saraf

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Self-Assembly of Nanoparticles on Live Bacterium: An Avenue to Fabricate Electronic Devices, Vikas Berry and Ravi F. Saraf

Deposition of CTAB-Terminated Nanorods on Bacteria to Form Highly Conducting Hybrid Systems, Dr.Ravi F. Saraf, Catherine J. Murphy, Subrata Kundu, Anand Gole, and Vikas Berry

Chemical& Engineering News - Gilded bacteria , Ravi Saraf and Vikas Berry

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Nature - Nanotechnology-Live Wire, Ravi F. Saraf and Vikas Berry

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Royal Society of Chemistry - Gold-plated bacteria, Ravi F. Saraf and Vikas Berry

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Self-Assembly of Nanoparticles on Live Bacterium: An Avenue to Fabricate Electronic Devices, Ravi F. Saraf and Vikas Berry

2004

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Highly Selective, Electrically Conductive Monolayer of Nanoparticles on Live Bacteria, V Berry, RangaSwamy S, and Ravi F. Saraf

Optical Properties of an Immobilized DNA Monolayer from 255 to 700 nm, Dr.Ravi F. Saraf, Gaurav Singh, and Selim Elhadj

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Bio-Chip, Photoluminescent Methods for Identifying Biological Material, and Apparatuses for Use with Such Methods and Bio-Chips, Ravi F. Saraf

2003

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Orientation of self-assembled block copolymer cylinders perpendicular to electric field in mesoscale film, S. Elhadj, J. W. Woody, V. S. Niu, and Ravi F. Saraf

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Stability of Order in Solvent-Annealed Block Copolymer Thin Films, Sanjun Niu and Ravi F. Saraf

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Ferroelectric Storage Read-Write Memory, Ravi F. Saraf

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Method for Forming an Antenna and A Radio Frequency Transponder, Ravi F. Saraf

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Micro Goniometer for Scanning Probe Microscopy, Ravi F. Saraf

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Plasticized, Antiplasticized and Crystalline Conducting Polymers And Precursors Thereof, Ravi F. Saraf

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Self Assembled Nano-Devices Using DNA, Ravi F. Saraf

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Synthesis of Chemical Tags, Ravi F. Saraf

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Solid-like dynamics in ultrathin films of polymeric liquids, Gaurav Singh, Ravi F. Saraf, and Yves Martin

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Solid-Like Dynamics in Ultrathin Films of Polymeric Liquids, Gaurav Singh, Ravi F. Saraf, and Yves Martin

2002

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An approach to sequence DNA without tagging, Sanjun Niu and Ravi F. Saraf

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An Approach to Sequence DNA without Tagging, Sanjun Niu and Ravi F. Saraf

Stability of Order in Solvent-Annealed Block Copolymer Thin Films, Dr.Ravi F. Saraf and Sanjun Niu

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Nano-Devices Using Block-Copolymers, Ravi F. Saraf

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Spontaneous Planarization of Nanoscale Phase Separated Thin Film, Ravi F. Saraf, Sanjun Niu, and Eric Stumb

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Spontaneous planarization of nanoscale phase separated thin film, Ravi F. Saraf, Sanjun Niu, and Eric Stumb

2001

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A direct correlation function for mesomorphic polymers and its application to the ‘smectic’ phase of isotactic polypropylene, Y Cohen and Ravi F. Saraf

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Corrosion and dissolution protection of a conductive silver/polymer composite, Ravi F. Saraf

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Electrically conductive polymeric materials and use thereof, Ravi F. Saraf

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Electrode Modification Using an Unzippable Polymer Paste, Ravi F. Saraf

Electrode Modification Using an Unzippable Polymer Paste, Ravi F. Saraf

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Electrode Modification Using an Unzippable Polymer Paste, Ravi F. Saraf

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Lead Free Conductive Composites for Electrical Interconnections, Ravi F. Saraf

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Nano-Devices Using Blockcopolymers, Ravi F. Saraf

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Polycrystalline Conducting Polymers and Precursors thereof having adjustable Morphology and Properties, Ravi F. Saraf

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Radio Frequency (RF) Transponder (TAG) with Composite Antenna, Ravi F. Saraf

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RFID Transponders with Paste Antennas and Flip-Chip Attachment, Ravi F. Saraf

Ultra High Density Storage Media and Method Thereof, Ravi F. Saraf

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Ultra High Density Storage Media and Method Thereof, Ravi F. Saraf

2000

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Composition containing a polymer and conductive filler and use thereof, Ravi F. Saraf

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Electrically conductive polymeric materials and use thereof, Ravi F. Saraf

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Electrode modification using an unzippable polymer paste, Ravi F. Saraf

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Enhanced adhesion between a vapor deposited metal and an organic polymer surface exhibiting tailored morphology, Ravi F. Saraf

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Lead-free interconnection for electronic devices, Ravi F. Saraf

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Micro goniometer for scanning microscopy, Ravi F. Saraf

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Ultra high density storage media and method thereof, Ravi F. Saraf

1999

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Composite comprising a metal substrate and a corrosion protecting layer, Ravi F. Saraf

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Direct chip attach for low alpha emission interconnect system, Ravi F. Saraf

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Lead free conductive composites for electrical interconnections, Ravi F. Saraf

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Lead-free interconnection for electronic devices, Ravi F. Saraf

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Method for providing discharge protection or shielding, Ravi F. Saraf

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Method for providing discharge protection or shielding, Ravi F. Saraf

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Methods of fabricating plasticized, antiplasticized and crystalline conducting polymers and precursors thereof, Ravi F. Saraf

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Organic-metallic composite coating for copper surface protection, Ravi F. Saraf

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Polycrystalline conducting polymers and precursors thereof having adjustable morphology and physical properties, Ravi F. Saraf

1998

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Direct chip attachment (DCA) with electrically conductive adhesives, Ravi F. Saraf

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Electronic package comprising a substrate and a semiconductor device bonded thereto, Ravi F. Saraf

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Lead-free interconnection for electronic devices, Ravi F. Saraf

1997

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Composition containing a polymer and conductive filler and use thereof, Ravi F. Saraf

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Plasticized, antiplasticized and crystalline conducting polymers, Ravi F. Saraf

1996

Surface-Influenced Phase Separation in Organic Thin Films on Drying, Dr.Ravi F. Saraf, Steve Ostrander, and R. M. Feenstra

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Fabrication of double side fully metallized plated thru-holes, in polymer structures, without seeding or photoprocess, Ravi F. Saraf

1995

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Corrosion and Protection of a Conductive Silver Paste, V. Brusic, G. S. Frankel, J. Roldan, and Ravi F. Saraf

Near Surface Structure of Solvent-free Processed Polyimide Thin Film, Ravi F. Saraf, Christos Dimitrakopoulos, Michael F. Toney, and Steven P. Kowalczyk

1994

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Electroless metal adhesion to organic dielectric material with phase separated morphology, Ravi F. Saraf

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Morphological composite materials formed from different precursors, Ravi F. Saraf

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Unzippable polymer mask for screening operations, Ravi F. Saraf

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Laser assisted Pd seeding for electroless plating on SiQ2, A. G. Schrott, B. Braren, and Ravi F. Saraf

1992

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Simulated crystalline structures of aromatic polyimides, Tze Wing Poon, B. David Silverman, Ravi F. Saraf, Angelo R. Rossi, and Paul S. Ho

1991

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Solder/polymer composite paste and method, Ravi F. Saraf