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Methods for Making Ultra-high Strength Multilayer Graphene Materials
This invention provides methods for making ultra-high strength, light-weight multilayer graphene materials.
Published: 12/21/2017   |   Inventor(s): Christos Dimitrakopoulos, Dimitrios Maroudas, Yuxi (Nancy) Wang
Category(s): Material science, Engineering, Physical Science, Nanotechnology, Electronics
Ultra-Compact Carbon Nanotube Sources and Integrated Circuits for Low-Cost Terahertz Spectroscopy and Imaging
Terahertz imaging is becoming an increasingly important non-destructive evaluation method, with biomedical, security, aerospace, and materials characterization applications. Large size and high cost currently limit broad commercial implementation of terahertz imaging and spectroscopy systems.


In this invention, a compact, low-cost terahertz source has been developed that may be easily integrated into several common high-frequency circuit designs, such as microstrip and coplanar waveguide.  In operation, the source, palladium or platinum nanowires, is coupled to antennas and subjected to a low voltage, causing the emission of terahertz radiation. The terahertz radiation emitting from the antennas is collimated by a silicon lens, which gives the system a broadcast range of 1-2 m. The required power to generate the radiation is extremely low, on the order of 100 nW. The UMass Terahertz Laboratory has successfully demonstrated the technology in a number of applications, including characterizing RNA flowing through a nanofluidic channel and the crystalline polymer PHB.

Published: 12/14/2017   |   Inventor(s): Sigfrid Yngvesson, Martin Muthee
Category(s): Nanotechnology, Electronics, Research tools
Method OF Transfer Printing
2-dimensional (2D) materials are characterized as being one or two atoms thick. Graphene (image above) is by far the best known 2D material. However, there are many other 2D materials with attractive properties (e.g. hexagonal boron nitrides (hBN), transition metal dichalcogenides, etc.). Due to their superior physical properties, graphene and related 2D materials have the potential to revolutionize many industries, enable development of new devices, and provide new functionalities to existing technologies. In short, these materials have the potential to be disruptive and pervasive. Despite their overwhelming promise, however, industrial scale manufacture of these materials is not yet a reality, due in part to an inability to control layer number and to print over large surface areas.


To address this problem, scientists at UMass Amherst have engineered a high-precision printing method that is compatible with current industrial manufacturing processes. This simple method allows single layer 2D material to be patterned, transferred and printed onto a substrate, enabling the fabrication of novel 2D heterostructures devices. Thus, this method will facilitate the assembly of novel devices and enable large-scale manufacture of devices with designed properties.

Published: 8/10/2017   |   Inventor(s): Qiangfei Xia, Peng Lin
Category(s): Material science, Nanotechnology
Patterning of 1-D, 2-D and 3-D Nanostructures
This invention provides methods of manufacturing a nanotextured surface comprising disposing a nanoparticulate ink on a substrate.
Published: 8/9/2017   |   Inventor(s): James Watkins, Rohit Kothari
Category(s): Material science, Nanotechnology, Physical Science, Devices & sensors
Ultra-high Strength Multilayer Graphene Materials
This invention relates to the use of single crystalline graphene to create multilayer structures of graphene materials with superior shear strength.
Published: 9/14/2016   |   Inventor(s): Christos Dimitrakopoulos, Dimitrios Maroudas, Andre Muniz, D. Kurt Gaskill
Category(s): Material science, Nanotechnology, Electronics, Engineering, Physical Science
Silver Nanoparticles Detection and Analysis in Complex Matrices
Silver nanoparticles (AgNPs) are the most commonly used nanoparticles in many consumer products and related matrices. Given the wide application and formation of AgNPs, the environmental and biological fate and toxicity of the AgNPs needs to investigated comprehensively, including if AgNPs transfer through different trophic levels and impact food chains. This invention was developed by combining hydrophobization-mediated extraction with unique capability of Surface-enhanced Raman spectroscopy (SERS).
Published: 9/13/2016   |   Inventor(s): Lili He, Baoshan Xing, Huiyuan Guo
Category(s): Devices, Diagnostic technology, Environmental, Healthcare, Engineering, Nanotechnology
Baterial Detection Platform
This invention invention is a bacterial detection platform integrating sensitive surface-enhanced Raman Scattering (SERS) capabilities and advanced mapping technique that generates detailed chemical images based on a sample’s Raman spectrum. The identification is based on the fingerprint of the bacterial SERS spectra.  The quantification of the cells will be based on the mapping technique
Published: 9/13/2016   |   Inventor(s): Lili He
Category(s): Diagnostic technology, Food technology & plant science, Environmental, Healthcare, Nanotechnology
Method for Preparing Aerogels and Foams
The technology described here is a method for making aerogels, the lightest and lowest density known solid on the planet.  Most aerogels are prepared using supercritical drying or freeze drying.  These techniques use supercritical fluids that are supercritical at high pressures and temperatures and can sometimes be hazardous.  Other supercritical fluid based methods use low pressure solvent removal and/or freezing and both of these methods are energy intensive and result in high production costs.

To prepare aerogels and foam materials using this process, the polymer material is frozen while the remaining steps take place at ambient pressure and room temperature. The resulting bioactive polymer has a bulk density of 500 -2500 grams per cubic meter. Compared to other methods, this is a cost-effective and safe method of preparing foams and aerogels. Moreover, the method consumes less energy and is also environmentally-friendly, as the aqueous solutions and solvents used in the process can be easily recovered and recycled.

Published: 9/13/2016   |   Inventor(s): Kenneth Raymond Carter, Yinyong Li
Category(s): Nanotechnology, Material science, Engineering, Physical Science
Efficient Thermoelectric Converters
The invention provides thermoelectric devices similar to conventional Peltier-elements based on folded, multi-layered nanomembranes prepared from 2-dimensional (2D) van der Waals materials. These van der Waals materials (e.g. graphene, hexagonal boron nitride, and transition metal dichalcogenides) have both single atomic layers with strong in-plane covalent bonding and weak bonding across atomic mononolayers. When devices are fabricated by folding monolayers onto themselves and into layered structures (figure). In this configuration, the electric path is shorter and the thermal path is suppressed. Moreover, multiple elements can be combined in series and parallel configurations to produce a useful amount of electricity. Thus, these devices can be used to convert waste-heat into electricity and can also serve a thermoelectric cooler. Some information about different applications here.
Published: 3/8/2016   |   Inventor(s): Zlatan Aksamija, Robert Blick
Category(s): Clean Energy, Devices, Devices & sensors, Electronics, Engineering, Material science, Nanotechnology, Physical Science
Nanoparticle-Stabilized Microcapsules for Effective Treatment of Bacterial Biofilms
Bacterial biofilms are widely associated with persistent infections. The amphiphilic construct of biofilms provides protection for bacterial cells by reducing absorption of conventional antimicrobials. This invention provides new nanoparticle-stabilized antimicrobial microcapsules that can effectively inhibit and eradicate pathogenic biofilms. The microcapsules contain antimicrobial essential oil materials and can efficiently deliver such materials to the cells of pathogenic bacteria in the biofilm, resulting in effective killing of the bacteria.
Published: 10/5/2015   |   Inventor(s): Vincent Rotello, Bradley Duncan, Xiaoning a/k/a Sharlene Li
Category(s): Healthcare, Life Sciences, Nanotechnology, Therapeutics & prevention
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