Press Releases
 
Imprinting Technology Improves Transistor-Based Biosensors

Silicon nanowires fabricated using an imprinting technology could be the way of the future for transistor-based biosensors.

Tsukuba, Japan, 28 February 2017 -- (ACN Newswire) -- Korean researchers are improving the fabrication of transistor-based biosensors by using silicon nanowires on their surface.

The team, led by Won-Ju Cho of Kwangwoon University in Seoul, based their device on the 'dual-gate field-effect transistor' (DG FET).

When molecules bind on a field-effect transistor, a change happens in the surface's electric charge. This makes FETs good candidates for detecting biological and chemical elements. Dual-gate FETs are particularly good candidates because they amplify this signal several times. But they can still be improved.

The team used a method called 'nanoimprint lithography' to fabricate silicon nanowires onto the surface of a DG FET and compared its sensitivity and stability with conventional DG FETs.

Field-effect transistors using silicon nanowires have already been drawing attention as promising biosensors because of their high sensitivity and selectivity, but they are difficult to manufacture. The size and position of silicon nanowires fabricated using a bottom-up approach, such as chemical vapor deposition, cannot always be perfectly controlled. Top-down approaches, such as using an electron or ion beam to draw nanorods onto a surface, allow better control of size and shape, yet they are expensive and limited by low throughput.

Cho and his colleagues fabricated their silicon nanowires using nanoimprint lithography. In this method, a thin layer of silicon was placed on top of a substrate. This layer was then pressed using a nanoimprinter, which imprints nano-sized wire-shaped lines into the surface. The areas between separate lines were then removed using a method called dry etching, which involves bombarding the material with chlorine ions. The resultant silicon nanowires were then added to a DG FET.

The team found that their device was more stable and sensitive than conventional DG FETs. "We expect that the silicon-nanowire DG FET sensor proposed here could be developed into a promising label-free sensor for various biological events, such as enzyme-substrate reactions, antigen-antibody bindings and nucleic acid hybridizations [a method used to detect gene sequences]," conclude the researchers in their study published in the journal Science and Technology of Advanced Materials.

Article information
Cheol-Min Lim, In-Kyu Lee, Ki Joong Lee, Young Kyoung Oh, Yong-Beom Shin and Won-Ju Cho.
Improved sensing characteristics of dual-gate transistor sensor using silicon nanowire arrays defined by nanoimprint lithography.
Science and Technology of Advanced Materials, 2016; 18:1, 17-25.
http://dx.doi.org/10.1080/14686996.2016.1253409

For further information please contact:
Professor Won-Ju Cho*,
Department of Electronic Materials Engineering, Kwangwoon University, Korea
*E-mail:

Journal information
Science and Technology of Advanced Materials (STAM), http://www.tandfonline.com/STAM) is an international open access journal in materials science. The journal covers a broad spectrum of topics, including synthesis, processing, theoretical analysis and experimental characterization of materials. Emphasis is placed on the interdisciplinary nature of materials science and on issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications.

For more information about STAM contact
Mikiko Tanifuji
Publishing Director
Science and Technology of Advanced Materials
E-mail:

Press release distributed by ResearchSEA for Science and Technology of Advanced Materials.

# # #


Submitted by ACN Newswire, ACN Newswire on Tuesday, 28 February 2017 at 8:31 PM
Category: Science & Research
 
Related News

Get The Best Convertible Sit Stand Desk & Adjustable Workstation With Extra Large Surface
Friday, 26 May 2017

Global Flame Retardant Textile Market Trends, Analysis and Forecasts 2017
Thursday, 25 May 2017

HKBU and HKUST decode the first deep-sea mussel genome
Tuesday, 23 May 2017

Global Sensor Market - Opportunity Analysis and Industry Forecast, 2014 - 2022
Tuesday, 23 May 2017

San Antonio Locksmith Launches New Website to Reach Out to a Younger Demographic
Saturday, 20 May 2017

Related Events

The Future Impact of Artificial Intelligence (AI) and Chatbots
Thursday, 15 Jun 2017

Annual Ghana Summit
Thursday, 22 Jun 2017

MINING ON TOP: AFRICA- SUMMIT (MOTA)
Thursday, 6 Jul 2017

Geological Society - Building Resilience to Geohazards
Thursday, 7 Sep 2017

Geological Society - Building Resilience to Geohazards
Thursday, 7 Sep 2017

Latest News

Neuroblastoma Therapeutics Pipeline Analysis, 2017 - Clinical Trials & Results, Patent and Other Dev
Saturday, 27 May 2017

Myocardial Infarction Therapeutics Pipeline Analysis 2017
Saturday, 27 May 2017

Food ProcessorsMarket Is Up To Mark And Still In Process Of Developing
Saturday, 27 May 2017

Automotive Steering Market Is Up To Mark And Still In Process Of Developing
Saturday, 27 May 2017

Nitrogenous Fertilizer Market Overview | Forecast & Analysis (2017-2021)
Saturday, 27 May 2017

 
Want to get your press releases, event listings, and job ads on Scoopasia? Register now for a FREE account or login if you already have one!
Scoopasia v1.0b. Copyright © 2017
Today is Saturday, 27 May 2017

About Scoopasia | FAQ | Privacy Policy | Contact Us

Press Releases
Event Listings
Job Listings
Arts & Entertainment
Architecture & Construction
Automotive & Travel
Business
Consumer Technology
Economy
Education
Enterprise Technology
Food & Fashion
Government & Policy
Health Care & Medical
Legal/Law
News & Media
Religion
Science & Research
Sports & Fitness
Login / Register
Get Scoopasia through RSS Feeds & Email Notifications!


Journalist's Toolbox
Hello journalist, welcome to Scoopasia--a powerful online resource for media information in Asia. Scoopasia has press releases and media events for every beat and industry. All content on Scoopasia is 100% FREE. You don't even need to login!

  • Scoop Line
    (Instant Information Request)
    The easiest way to ask questions and request information from the PR community.


  • Advanced Search
    Drill down, dig deep, for media information the way you want it.

  • Journalist's Resources
    Resources and tools you can't do without.

  • PR Tools
    Scoopasia Blog Search
    Search the largest handpicked collection of Asia's most prominent and influential blogs.


    Resources
  • PR Bookmarks
  • Web 2.0 Bookmarks
  • Media Bookmarks

    More Coming Soon...

  • Upcoming Events
  • 40 Congreso Nacional de la Sociedad Espanola de Inmunologia
  • 3rd European Congress on Intrapartum Care
  • EAED - European Academy of Esthetic Dentistry, 31st Spring Meeting
  • Writing in Response to Enquiries & Feedback
  • 2nd Annual Internal Medicine in Primary Care Conference

  • Latest Jobs
  • London Investment Property
  • We Are Hiring A Content Manager!