(Press-News.org) Contact information: Franziska Hornig
franziska.hornig@springer.com
49-622-148-78414
Springer
A step closer to composite-based electronics
A new study demonstrates that electrical resistivity obeys a staircase-like dependence on the conducting particle concentration in composite materials
Composite materials are of increasing interest to physicists. Typically, they are made of electrically conducting elements - such as spherical metallic or elongated carbon particles - embedded in an insulating glass or a polymer matrix. Their controllable electrical resistivity, combined with their light and flexible properties, makes them suited for applications in flexible electronics. Now, a theoretical model, confirmed experimentally, elucidates how electrical resistivity varies with the concentration of the particles in these composite materials. These findings, by Isaac Balberg and colleagues from the Hebrew University in Jerusalem, have been published in EPJB.
To understand the dependence of resistivity on the concentration of the electrically conducting particles, the authors apply percolation theory. It provides a map for the number and size of clusters of adjacent particles as the concentration of particles increases. In this study, the authors note that the resistances involved in the electrical conduction can have a given discrete series of values unlike a single one or a continuous distribution found in many previous works.
Balberg and colleagues made the theoretical prediction - and proved experimentally using granular metal and carbon-black composites - that the dependence of the electrical resistance on the conducting particle concentration is manifested by a staircase. This was particularly obvious in nanometric scale systems, in which there is a well-defined discrete series of distances between a particle and its neighbours. Each stair exhibits a universal behaviour - independent of the details of the system - predicted by percolation theory. The electrical resistivity associated with subsequent stairs decreases as the concentration of the conducting particles increases.
This work was also able to shed light on many previously unexplained data related to characteristics of various types of composites, such as those containing carbon nanotubes or graphene.
###
Reference:
Balberg et al. (2013), The percolation staircase model and its manifestation in composite materials, European Physical Journal B, DOI 10.1140/epjb/e2013-40200-7
For more information visit: http://www.epj.org
The full-text article is available to journalists on request.
A step closer to composite-based electronics
A new study demonstrates that electrical resistivity obeys a staircase-like dependence on the conducting particle concentration in composite materials
2013-11-25
ELSE PRESS RELEASES FROM THIS DATE:
Rice scientists ID new catalyst for cleanup of nitrites
2013-11-25
Rice scientists ID new catalyst for cleanup of nitrites
Gold-palladium nanocatalysts set new mark for breakdown of nitrites
HOUSTON -- (Nov. 25, 2013) -- Chemical engineers at Rice University have found a new catalyst that can rapidly break down nitrites, a common and harmful ...
Common brain cell plays key role in shaping neural circuits, Stanford study finds
2013-11-25
Common brain cell plays key role in shaping neural circuits, Stanford study finds
STANFORD, Calif. — Stanford University School of Medicine neuroscientists have discovered a new role played by a common but mysterious class of brain cells.
Their ...
Obesity associated with higher risk of hearing loss in women
2013-11-25
Obesity associated with higher risk of hearing loss in women
Physical activity associated with lower risk
Boston, MA – According to the World Health Organization, 360 million people have disabling hearing loss, a condition that is often considered to ...
Drug regimen may eliminate colonization with superbug CRE
2013-11-25
Drug regimen may eliminate colonization with superbug CRE
Washington, DC, November 25, 2013 – Orally administered, nonabsorbable antibiotics were effective in eradicating carbapenem-resistant Enterobacteriaceae (CRE) colonization, according ...
The collared treerunner is more than a single species
2013-11-25
The collared treerunner is more than a single species
The lowland tropics were once though filled with widespread species, while moderate and higher elevations were thought to contain species with more restricted distributions. That idea is turning out to be partially incorrect. ...
Maternal mood disorder and newborn neurobehavior
2013-11-25
Maternal mood disorder and newborn neurobehavior
A great number of women experience depression or anxiety while pregnant, and exposure of the fetus to these maternal mood disorders may lead to long-term emotional and behavioral problems in the offspring. Many studies have ...
EORTC Cancer in the Elderly Task Force investigates appropriate treatment for elderly patients
2013-11-25
EORTC Cancer in the Elderly Task Force investigates appropriate treatment for elderly patients
As we age, we experience a progressive decline in many of our bodily functions. This decline can vary greatly from individual to individual. One 75 ...
More pediatric kidney patients are being treated with minimally invasive surgical techniques
2013-11-25
More pediatric kidney patients are being treated with minimally invasive surgical techniques
DETROIT – More children, like adults, are undergoing minimally invasive surgery for diseased kidneys, with most of the procedures being performed at teaching hospitals ...
Clevelanders: Lighting up in a new way
2013-11-25
Clevelanders: Lighting up in a new way
New data brief shows little cigar use up in young adults
A new data brief released by the Prevention Research Center for Healthy Neighborhoods at Case Western Reserve University (PRCHN) shows that more than one-in-five ...
Cyber resilience metrics needed to meet increased threats
2013-11-25
Cyber resilience metrics needed to meet increased threats
Managing resilience for cyber systems requires metrics that reflect the relationships among system components in physical, information, cognitive and social domains
Cyber threats are rapidly ...
LAST 30 PRESS RELEASES:
Less intensive works best for agricultural soil
Arctic rivers project receives “national champion” designation from frontiers foundation
Computational biology paves the way for new ALS tests
Study offers new hope for babies born with opioid withdrawal syndrome
UT, Volkswagen Group of America celebrate research partnership
New Medicare program could dramatically improve affordability for cancer drugs – if patients enroll
Are ‘zombie’ skin cells harmful or helpful? The answer may be in their shapes
University of Cincinnati Cancer Center presents research at AACR 2025
Head and neck, breast, lung and survivorship studies headline Dana-Farber research at AACR Annual Meeting 2025
AACR: Researchers share promising results from MD Anderson clinical trials
New research explains why our waistlines expand in middle age
Advancements in muon detection: Taishan Antineutrino Observatory's innovative top veto tracker
Chips off the old block
Microvascular decompression combined with nerve combing for atypical trigeminal neuralgia
Cutting the complexity from digital carpentry
Lung immune cell type “quietly” controls inflammation in COVID-19
Fiscal impact of expanded Medicare coverage for GLP-1 receptor agonists to treat obesity
State and sociodemographic trends in US cigarette smoking with future projections
Young adults drive historic decline in smoking
NFCR congratulates Dr. Robert C. Bast, Jr. on receiving the AACR-Daniel D. Von Hoff Award for Outstanding Contributions to Education and Training in Cancer Research
Chimpanzee stem cells offer new insights into early embryonic development
This injected protein-like polymer helps tissues heal after a heart attack
FlexTech inaugural issue launches, pioneering interdisciplinary innovation in flexible technology
In Down syndrome mice, 40Hz light and sound improve cognition, neurogenesis, connectivity
Methyl eugenol: potential to inhibit oxidative stress, address related diseases, and its toxicological effects
A vascularized multilayer chip reveals shear stress-induced angiogenesis in diverse fluid conditions
AI helps unravel a cause of Alzheimer's disease and identify a therapeutic candidate
Coalition of Autism Scientists critiques US Department of Health and Human Services Autism Research Initiative
Structure dictates effectiveness, safety in nanomedicine
Mission accomplished for the “T2T” Hong Kong Bauhinia Genome Project
[Press-News.org] A step closer to composite-based electronicsA new study demonstrates that electrical resistivity obeys a staircase-like dependence on the conducting particle concentration in composite materials