|By ACN Newswire||
|February 7, 2013 09:46 AM EST||
Several different approaches have been used to construct 'micro-Velcro', but the most promising are those that use self-assembling or self-organising techniques, where microwires are 'squeezed' from a composite material by compression. Researchers at Ruhr University Bochum, Germany, have used this technique to produce gold microwires that have suitable properties for micro-Velcro.
The scientists created thin films of composite materials containing gold and tungsten metal. These were then heated to very high temperatures, causing the tungsten to react with oxygen and form tungsten oxide. This increased the volume of the tungsten and caused compression within the composite, 'squeezing' the softer gold out as 'whiskers'.
Different ratios of gold to tungsten were tried in the original composite, and these were heated to different temperatures and for different times to find the optimal conditions. The best result produced gold microwires approximately 35 micrometres long - similar to the width of a human hair - and 2 micrometres in diameter.
The resulting gold microwires have larger diameters than indium metal microwires that had previously been made using a similar technique, making them more suitable for micro Velcro. The results demonstrate that this new approach is a feasible one for producing the microwires that could be used to make micro-Velcro.
This research was published in the journal, Science and Technology of Advanced Materials.
 Synthesis of Au microwires by selective oxidation of Au-W thin-film composition spreads.
S. Hamann et al. Sci Technol. Adv. Mater. Vol. 14 (2013) p. 015003.
National Institute for Materials Science, Tsukuba, Japan
Press release distributed by ResearchSEA for National Institute for Materials Science.
Source: National Institute for Materials Science
Copyright 2013 ACN Newswire. All rights reserved.
- "All It Took Was One E-Mail to Larry," Says Former eBay Research Director As He Moves to Google
- Google Ramps Up Its Mobile Reach: Launches "Mobile Web Search"
- VoIP Update: Yahoo! Buys DialPad
- Ericsson + Napster = World's First "Wireless Digital Music" Brand
- SYS-CON i-Technology Podcast August 30, 2005
- A Flair for Food - Health-Conscious Cooking Is This Chef's Cup Of Tea
- Sony PSP May Feature Porn
- Free Guest Passes for the SOA World Conference & Expo in NYC
- South Korea is World's Largest Phisher
- Kapow Helps Seiko UK, Provides SMS Text-Alert Services
- Will the Mac OS Now Be Offered by Dell?
- UK Targeted for Trojan Attacks