Thin Films & Nanomaterials

nanomaterials

Stable Nanopores in Graphene

This technology consists of a method to fabricate a truly 2 dimensional porous surface using graphene with stabilized pore diameters less than a few nanometers. The nanopores are inert and stable for extended periods of time (several months) and under extreme conditions. The resulting membrane can be used in water purification, chemical separation, sensing, DNA sequencing, and other applications.

Summary

This novel technology consists of a method to fabricate a truly 2 dimensional porous surface using graphene with stabilized pore diameters less than a few nanometers.

Licensing manager: 
Chris Harris
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Ferroelectric Nanofluids for Piezoelectric and Electro-Optic Uses

Researchers at Vanderbilt University have developed a new method of producing microscale and nanoscale ferroelectric fluids. These particles are useful in a variety of piezoelectric, pyroelectric, and electrooptic devices such as thin-film capacitors, electronic transducers, actuators, high-k dielectrics, pyroelectric sensors, and optical memories.

Summary
Researchers at Vanderbilt University have developed a new method of producing microscale and nanoscale ferroelectric fluids.  These particles are useful in a variety of piezoelectric, pyroelectric, and electrooptic devices such as thin-film capacitors, electronic transducers, actuators, high-k dielectrics, pyroelectric sensors, and optical memories. 

Licensing manager: 
Chris Harris
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Composite Material for Tunable Memristance Behavior

This technology uses combinations of materials with different electronic properties of micro-or nanometerscale grain size to create a memristive device (twoterminal, variable resistance circuit element). Amidst growing interest in memristors, this technology is one of the first to use composite materials, which make the memristive qualities of the material tunable.

Summary

This technology uses combinations of materials with different electronic properties of micro-or nanometerscale grain size to create a memristive device (twoterminal, variable resistance circuit element).

Licensing manager: 
Ashok Choudhury
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Ordered Mesoporous Silica- Metal Organic Composite Adsorbent

Vanderbilt researchers have developed a novel biphasic adsorbent material that is useful for the removal of contaminant molecules, including toxic light gases, from gases and liquids. This revolutionary material provides enhanced adsorption capacity and stability for a broad range of chemicals compared to conventional commercial and research grade adsorbent materials.

Summary

Vanderbilt researchers have developed a novel biphasic adsorbent material that is useful for the removal of contaminant molecules, including toxic light gases, from gases and liquids.

Licensing manager: 
Ashok Choudhury
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Nanostructured Molybdenum (IV) disulfide (MoS2) Electrodes

The most common counter electrode materials used for in Quantum dot sensitized solar cells (QDSSCs) quickly become poisoned by sulfide, resulting in significant current drops, which lowers solar cell efficiencies and makes them unsuitable for long-term use in a device. Also, some of these materials are rare and expensive, so replacing them with an inexpensive, earth-abundant material is a desirable goal. This invention uses a Mo foil to produce the desired uniform growth of Molybdenum (IV) disulfide (MoS2) petals from the Mo foil, making the foil both the source of Mo as well as the substrate. This petaled MoS2 electrode shows a vastly improved polysulfide reduction compared to Glassy Carbon, ordinary Mo foil, Pt and Au. The petaled MoS2 electrode lost only 0.63% of its initial current density at -1 V whereas Pt lost 13.58% after only five scans, indicating the petaled MoS2 films are highly stable as cathodes. The technology was tested in a solar device setting, using standard photoanodes to test the efficiency of a device employing petaled MoS2 as its cathode. Devices in which a petaled MoS2 cathode was used achieved nearly fivefold improvement in efficiency over those employing a Pt cathode.

Description of Technology
Quantum dot sensitized solar cells (QDSSCs) are a widely studied system for harvesting light and converting it to electrical energy.  QDs are an attractive photoabsorber because their energy of absorption in the visible region can be tuned based on their size and because they have large absorption coefficients.

Licensing manager: 
Chris Harris
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Biohybrid, Photoelectrochemical Energy Conversion Device Based on Photosystem I Deposited Silicon Electrodes

Summary: Aresearch team at Vanderbilt University have developed a biohybrid, photoelectrochemical energy conversion device with multilayer films of Photosystem I (PSI) deposited on silicon electrodes, which yielded an average photocurrent density of 875 µA/cm2; one of the highest reported photocurrent densities for a film of PSI deposited onto an electrode of any material.

Summary

A research team at Vanderbilt University have developed a biohybrid, photoelectrochemical energy conversion device with multilayer films of Photosystem I (PSI) deposite

Licensing manager: 
Chris Harris
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Bright White Light Nanocrystals for LEDs

A research team lead by Professor Sandra Rosenthal at Vanderbilt University has developed nanocrystals (~2 nm diameter) that emit white light with very high quantum efficiency. This technology would be a viable cost effective candidate for commercial solid-state lighting applications, such as Light Emitting Diodes (LEDs). These nanocrystals were originally discovered by the same group in 2005; a recent breakthrough in post-treatment results in improving fluorescent quantum yield up to ~ 45%.
Licensing manager: 
Chris Harris
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Method of Preparing Vanadium Dioxide Nanoparticles

This technology provides a method for preparing VO2 nanoparticles having controlled size utilizing inverse micelle hydrolysis

Summary
This technology provides a method for preparing vanadium dioxide (VO2) nanoparticles having controlled size utilizing inverse micelle hydrolysis.

Technology Background 
Semiconductor-to-metal phase transition temperature for VO2 is 340 K.  Below 340 K, VO2 is a semiconductor with monoclinic unit

Licensing manager: 
Taylor Jordan
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Easy-to-Fabricate, Cost-Effective, and Stable Surface Enhanced Raman Scattering (SERS) substrates

Vanderbilt researchers have developed a Surface Enhanced Raman Scattering (SERS) substrate with demonstrated signal amplification over one order of magnitude greater than commercially available SERS substrates. Very significantly, the newly developed substrates utilize a simple inexpensive imprinting process on nanoporous gold and are thus amenable for high-volume production.

Summary

Vanderbilt researchers have developed a Surface Enhanced Raman Scattering (SERS) substrate with demonstrated signal amplification over one order of magnitude greater than commercially available SERS su

Licensing manager: 
Ashok Choudhury
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Ultrasonic Sensor for Non-intrusive Local Temperature, Transient Temperature and Heat Flux Measurements

An apparatus for measuring the temperature and heat flux of materials through the use of an ultrasonic sensor has been developed at Vanderbilt University. The sensor uses acoustic measurement techniques to determine the heat flux and temperature of material surfaces otherwise inaccessible in particular during system operation in order to enhance monitoring capabilities and reduce unsafe or impaired function due to extreme temperatures.

Summary

An apparatus for measuring the temperature and heat flux of materials through the use of an ultrasonic sensor has been developed at Vanderbilt University.

Licensing manager: 
Ashok Choudhury
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