Novel, Uniform, and Versatile Diamond Nanowires (Case 2031)(EA)

Principal Investigator:


Jingming Xu, PhD, Professor

School of Engineering

Brown University

Providence, RI


Brief Description:


Diamond has unique physical properties of interest for scientific R&D, commercial and military applications.  Diamond is the hardest and has the highest thermal conductivity of all known materials.  It's wide band gap, high electron and hole mobility, and negative electron affinity (NEA) make it an attractive candidate for use in ultraviolet (UV) light detectors and emitters, radiation particle detectors, DNA sensors, field-effect transistors, electron field emission sources, position-sensitive biochemical substrates, and many other possible applications, including those subjected to harsh environments – high temperatures or high-power devices for use in space.


Techniques for growing crystalline diamond have evolved from high-temperature, high-pressure (HTHP) to plasma enhanced chemical vapor deposition (PECVD) methods. Synthesis of crystalline diamond nanowires is of major interest, because they offer the potential to enable applications across many disciplines for advancing the science of material synthesis at the nano- and atomic scales and for validating the search into new forms of carbon.  However, fabrication of long, single crystalline diamond nanowires using conventional thermal CVD methods has not been achieved.


The invention is a novel, proprietary method to grow diamond nanowires from a variety of carbon sources or substrates using chemical vapor deposition (CVD), and to incorporate such in particular apparatuses.  The resultant nanowires may be long or short, thin, single or not, straight or crystalline, and/or embedded in a shell and/or within layers.  These relatively flexible nanowire growth conditions can produce versatile nanowires with varying diameters, lengths, morphologies, and crystalline properties for use in specific applications such as field-effect transistors, requiring nanowires, to achieve high power, high temperature and/or speeds. 


Many applications have been mentioned above, and coinciding markets are several including, but not limited to, pharmaceuticals, electronics, scientific R&D research tools for materials science, physics, engineering, and space exploration/experimentation.




US Patent 9,200,378 is issued (12/01/2015).

Patent Information:
For Information, Contact:
Margaret Shabashevich,
Manager of Operations
Office of Industry Engagement & Commercial Venturing
Brown University
Jingming Xu
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