Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Key Milestone Reached on Road to Graphene-Based Electronic Devices

02.02.2010
Researchers in the Electro-Optics Center (EOC) Materials Division at Penn State have produced 100mm diameter graphene wafers, a key milestone in the development of graphene for next generation high frequency electronic devices.

Graphene is a 2-dimensional layer of tightly bound carbon atoms arranged in hexagonal arrays. Sheets of graphene are the building blocks of graphite. Due to its phenomenal electronic properties, graphene has been considered as a leading material for next generation electronic devices in the multibillion dollar semiconductor industry.

Using a process called silicon sublimation, EOC researchers David Snyder and Randy Cavalero thermally processed silicon carbide wafers in a physical vapor transport furnace until the silicon migrated away from the surface, leaving behind a layer of carbon that formed into a one- to two-atom-thick film of graphene on the wafer surface. Achieving 100mm graphene wafers has put the Penn State EOC in a leading position for the synthesis of ultra-large graphene and graphene-based devices.

With the support of the Naval Surface Warfare Center, EOC researchers are initially focusing on graphene materials to improve the transistor performance in various radio frequency (RF) applications. According to EOC materials scientist Joshua Robinson, Penn State is developing graphene device processing to enhance graphene transistor performance and has fabricated RF field effect transistors on 100mm graphene wafers.

Another goal of the Penn State researchers is to improve the electron mobility of the Si-sublimated wafers to nearer the theoretical limit, approximately 100 times faster than silicon. That will require improvements in the material quality and device design, says Robinson, but there is significant room for improvements in growth and processing, he believes.

In addition to silicon sublimation, EOC researchers Joshua Robinson, Mark Fanton, Brian Weiland, Kathleen Trumbull, and Michael LaBella are developing the synthesis and device fabrication of graphene on silicon using a non-sublimation route as a means to achieve wafer diameters exceeding 200mm, a necessity for integrating graphene into the existing semiconductor industry. Graphene has the potential to enable terahertz computing at processor speeds 100 to 1000 times faster than silicon.

First discovered in 2004, graphene is now being studied worldwide for electronics, displays, solar cells, sensors, and hydrogen storage. With its remarkable physical, chemical, and structural properties, graphene promises to become a key material for 21st century technology.

The Materials Research Institute coordinates the research of more than 200 materials scientists at Penn State. The Millennium Science Complex, now under construction, is a $225M facility for materials and life sciences research scheduled to open at University Park in summer 2011. Visit MRI on the Web at www.mri.psu.edu.

EOC Contact: Joshua Robinson, Ph.D., jrobinson@psu.edu

Joshua Robinson | Newswise Science News
Further information:
http://www.psu.edu

More articles from Materials Sciences:

nachricht Novel sensors could enable smarter textiles
17.08.2018 | University of Delaware

nachricht Quantum material is promising 'ion conductor' for research, new technologies
17.08.2018 | Purdue University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>