Navigation Links
Paper electrified by copper particles
Date:3/16/2009

The Polymer Chemistry Research Group at the University of Helsinki, Finland, has succeeded in producing nano-sized metallic copper particles. When the size of particles is reduced to a nano-scale (one nanometre being one billionth of a metre), the properties of the material undergo substantial changes. Unlike in bulk materials, in nanoparticles the number of surface atoms is considerably greater than the number of atoms inside the material, which, among other things, makes the melting temperature of nanomaterials very low. With suitable heat treatment (sintering), the particles manufactured by the research group can be made to form electricity-conducting layers and patterns on paper.

The research result is interesting in that polymer-protected metal particles can also be used in various electronics applications: various kinds of intelligent patterns can be printed on paper that, in the future, may replace components such as electronics boards.

The findings were recently reported in an international journal.

The purpose of the research was to test the ability of polymeric and small-molecule compounds that contain amine groups to protect copper nanoparticles during their manufacturing stage. The particles were manufactured with either poly(ethylene imine) (PEI) or tetraethylenepentamine (TEPA) used as protecting compounds. The average size of the particles at room temperature was 8.5 nm (with PEI as the protecting agent) or 19.4 nm (with TEPA as the protecting agent). Slightly oxidised at their surface, the particles were sintered to the paper surface, and the electrical conductivity of the layer thus formed was measured. Particles manufactured using PEI released the protective agent during sintering at relatively low temperatures (150-200 C). At these temperatures, the size of the particles increased rapidly. The electrical conductivity of the sintered particles was good, which makes them promising materials for use in electronics printed on paper.

At the University of Helsinki, a research group led by Professor Heikki Tenhu synthesises the so-called intelligent polymers and studies controlled polymerisation reactions. Polymers are large-molecule compounds that, as functional materials, change their properties according to the changing ambient conditions.


'/>"/>

Contact: Heikki Tenhu
heikki.tenhu@helsinki.fi
358-919-150-334
University of Helsinki
Source:Eurekalert

Related biology technology :

1. New White Paper Details Strategies for Biotechnology Companies to Improve EH&S Compliance
2. Free White Papers Detail Sterility Testing Essentials for Medical Device, Pharmaceutical Manufacturers
3. 454 Sequencing(TM): Science Paper Suggests That Structural Variation Plays an Important Role in Genetic Variation
4. New White Paper Details Six Steps to Investigate and Prevent Laboratory Accidents
5. Microtest Offers Free White Paper: Virus Testing for Biological Products: Partnering With a Contract Lab
6. Free White Paper Addresses Challenges of New FDA Regulations Awaiting Combo Product Manufacturers
7. New paper reveals nanoscale details of photolithography process
8. Free White Paper Helps Biotech Laboratories Maintain a High Level of Infection Control
9. Free White Paper Available for Clinical Laboratory Managers: Effectively Isolating Anaerobic Bacteria
10. White Paper Details Infection Control Challenges Hospitals Must Address During Construction
11. UW paper in Science shows how some solids mimic liquids on nanoscale
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/12/2017)... Diego, CA (PRWEB) , ... ... ... (https://www.onramp.bio/ ) has launched Rosalind™, the first-ever genomics analysis platform specifically ... all bioinformatics complexity. Named in honor of pioneering researcher Rosalind Franklin, who ...
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ... pathology, announced today it will be hosting a Webinar titled, “Pathology is going ... Pathology Associates , on digital pathology adoption best practices and how Proscia improves ...
(Date:10/11/2017)... Tampa Bay, Florida (PRWEB) , ... October 11, ... ... Food and Drug Administration (FDA) has granted orphan drug designation to SBT-100, its ... antibody (sdAb) for the treatment of osteosarcoma. SBT-100 is able to cross the ...
(Date:10/10/2017)... International research firm Parks Associates announced today that ... TMA 2017 Annual Meeting , October 11 in Scottsdale, ... security market and how smart safety and security products impact the competitive ... Parks Associates: Smart Home Devices: Main ... "The residential security market has experienced continued ...
Breaking Biology Technology:
(Date:4/24/2017)... April 24, 2017 Janice Kephart ... with  Identity Strategy Partners, LLP (IdSP) , today ... without President Trump,s March 6, 2017 Executive ... , refugee vetting can be instilled with greater confidence, ... now, all refugee applications are suspended by until ...
(Date:4/13/2017)... India , April 13, 2017 According to ... Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, ... MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 Billion ... Growth Rate (CAGR) of 17.3%. ... MarketsandMarkets ...
(Date:4/6/2017)... , April 6, 2017 ... RFID, ANPR, Document Readers, by End-Use (Transportation & Logistics, ... Facility, Oil, Gas & Fossil Generation Facility, Nuclear Power), ... Educational, Other) Are you looking for a ... sector? ...
Breaking Biology News(10 mins):