New method of electron spectroscopy pushes nanospectroscopy limits

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To better understand advanced materials such as graphene nanostructures and enhance them for devices in opto-, nano-, and quantum-technology, it is important to comprehend how phonons—the vibration of atoms in solids—impact the materials’ properties.

Scientists from the University of Vienna, the Advanced Institute of Science and Technology (AIST) in Japan, the company JEOL, and La Sapienza University in Rome have formulated a technique that can measure all phonons present in a nanostructured material. This is an innovation in the examination of nanoscale functional materials and devices.

With this pilot research using graphene nanostructures, these scientists have demonstrated the uniqueness of their method, which will be described in a recent issue of Nature.

Crucial thermal, optoelectronic, mechanical, and transport characteristics of materials are regulated by phonons: the propagating atomic vibrational waves. It is then inferable that the determination of such lengthy atomic vibrations is vital for the optimization of nanoelectronic devices. The presently available methods use optical techniques as well as inelastic electron-, X-ray- and neutron scattering.

Regardless of its scientific significance in the last ten years, none of these approaches has been able to establish all phonons of a freestanding monolayer of two dimensional (2D) materials such as graphene and their local variants within a graphene nanoribbon, which are in turn employed as active elements in nano- and optoelectronics. Read full article here.

About the National Graphene Association (NGA)

The National Graphene Association is the main organization and body in the U.S. advocating and promoting the commercialization of graphene. NGA is focused on addressing critical issues such as policy and standards development that will result in effective integration of graphene and graphene-based materials globally. NGA brings together current and future graphene stakeholders — entrepreneurs, companies, researchers, developers and suppliers, investors, venture capitalists, and government agencies — to drive innovation, and to promote and facilitate the commercialization of graphene products and technologies. Join NGA here.

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