Ultra-thin, all-inorganic molecular nanowires successfully compounded
2015-07-08
(Press-News.org) Nanowires are wired-shaped materials with diameters that are tens of nanometers or less. There are many types of nanowires, including semiconducting composite nanowires, metal oxide composite nanowires, and organic polymer nanowires, and they are typically used in functional materials and devices used as sensors, transistors, semiconductors, photonics devices, and solar cells.
Molecular wires composed of only inorganic materials have attracted significant attention due to their stable structures, tunable chemical compositions, and tunable properties. However, there have only been a few reports regarding the development of all-inorganic molecular nanowires.
Dr. Zhenxin Zhang and Prof. Wataru Ueda at the Catalysis Research Center at Hokkaido University (Prof. Ueda is currently working for Kanagawa University) and their collaborators at Hokkaido University, Hiroshima University, and Japan Synchrotron Radiation Research Institute/SPring-8 successfully created ultrathin all-inorganic molecular nanowires, composed of a repeating hexagonal molecular unit made of Mo and Te; the diameters of these wires were only 1.2 nm. These nanowires were obtained by the disassembly of the corresponding crystals through cation exchange and subsequent ultrasound treatment.
Furthermore, the researchers have shown that the ultrathin molecular wire-based material exhibits high activity as an acid catalyst, and the band gap of the molecular wire-based crystal is easily tuned via heat treatment. It is expected that the metal oxide molecular wire-based materials will open up new fields of research in heterogeneous catalysts, thermochromic materials, and semiconductors, as well as other related fields.
"This is a very rare isolated molecular nanowire based on transition metal-oxygen octahedra, and is an attractive catalyst due to the large surface area," said Professor Masahiro Sadakane, a coauthor of this study, from Hiroshima University.
INFORMATION:
Published article:
Zhenxin Zhang, Toru Murayama, Masahiro Sadakane, Hiroko Ariga, Nobuhiro Yasuda, Norihito Sakaguchi, Kiyotaka Asakura, Wataru Ueda, "Ultrathin Inorganic Molecular Nanowires based on Polyoxometalates," Nature Communications (2015) 6, 7731.
http://www.nature.com/ncomms/2015/150703/ncomms8731/full/ncomms8731.html
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
2015-07-08
The research team led by Dr. Jongsoo Jurng and Dr. Gwi-Nam at KIST stated that, "In cooperation with KT&G, KIST has developed a nano-catalyst filter coated with a manganese oxide-based nano-catalyst, which can be used in a smoking room to reduce and purify major harmful substances of cigarette smoke. the KIST-developed catalyst removes 100% of the particle substances of cigarette smoke, such as nicotine and tar, converting those into water vapor and carbon dioxide. According to the research team, the air cleaning equipment based on the newly-developed catalyst can purify ...
2015-07-08
Heavy rainfall events setting ever new records have been increasing strikingly in the past thirty years. While before 1980, multi-decadal fluctuations in extreme rainfall events are explained by natural variability, a team of scientists of the Potsdam Institute for Climate Impact Research detected a clear upward trend in the past few decades towards more unprecedented daily rainfall events.
They find the worldwide increase to be consistent with rising global temperatures which are caused by greenhouse-gas emissions from burning fossil fuels. Short-term torrential rains ...
2015-07-08
Male badgers that spend their youth fighting tend to age more quickly than their passive counterparts according to new research from the University of Exeter.
The 35-year study revealed that male badgers living alongside a high density of other males grow old more quickly than those living with lower densities of males.
The results, which are published in the Proceedings of the Royal Society B, indicate that competition between males in early life accelerates ageing in later life, providing a potential explanation for why males age faster than females.
Author Christopher ...
2015-07-08
A review in The Obstetrician & Gynaecologist (TOG) finds that reducing the risk of stillbirth calls for better monitoring of women during their pregnancy to help find those whose babies' lives could be saved by early delivery.
In the UK the absolute risk of stillbirth is low, affecting approximately 4 in 1000 babies (MBRRACE). Although for most cases the exact cause of death is unclear, stillbirth is associated with complications during childbirth, maternal infections during pregnancy, maternal health conditions such as high blood pressure or diabetes, foetal growth restriction ...
2015-07-07
Several recent U.S. health policies, including the Affordable Care Act, provide incentives for transforming the delivery of health care to improve its value for dollar. Michael K. Gusmano, a Hastings Center scholar, and Frank J. Thompson, a distinguished professor at Rutgers University, critically examine efforts to shape the delivery of Medicaid through demonstration projects called Delivery System Reform Incentive Payment Initiatives (DSRIP). Despite political enthusiasm for DSRIP, they conclude in an article in Health Affairs that the evidence supporting its effectiveness ...
2015-07-07
Experiments by Carnegie Mellon University showed that significantly fewer women than men were shown online ads promising them help getting jobs paying more than $200,000, raising questions about the fairness of targeting ads online.
The study of Google ads, using a CMU-developed tool called AdFisher that runs experiments with simulated user profiles, established that the gender discrimination was real, said Anupam Datta, associate professor of computer science and of electrical and computer engineering. Still unknown, he emphasized, is who or what is responsible. Was ...
2015-07-07
Office work will become much less of a pain in the neck if Julie Côté has her way. That`s because this kinesiology researcher who teaches at McGill University is interested in finding ways to reduce or even prevent the kinds of muscular and skeletal stresses and pains that will affect one in ten office workers at some point in their careers. "Even though office workers may not naturally see it that way, their body is basically their work instrument, just as it is for an athlete," says Côté. "It can get injured in similar ways and for similar reasons: ...
2015-07-07
PORTLAND, Ore. - Scientists at Oregon Health & Science University, Stanford University, University of Valencia and IGENOMIX have discovered that chromosomal abnormalities in human embryos created for in vitro fertilization, or IVF, can be predicted within the first 30 hours of development at the cell-1 stage which results from the union of a female egg and male sperm.
This discovery, published online today in the journal Nature Communications, could improve IVF success rates, which has hovered around 30 to 35 percent for numerous years worldwide. It is estimated that ...
2015-07-07
We ask a lot of the land: feed the world with crops, power the world with bioenergy, retain nutrients so they don't pollute our water and air. To help landscapes answer these high demands, scientists from the U.S. Department of Energy's Argonne National Laboratory are designing ways to improve--and hopefully optimize--land use.
In collaboration with the farming community of the Indian Creek Watershed in central Illinois, these researchers are finding ways to simultaneously meet three objectives: maximize a farmer's production, grow feedstock for bioenergy and protect ...
2015-07-07
How much a child's pupil dilates in response to seeing an emotional image can predict his or her risk of depression over the next two years, according to new research from Binghamton University.
VIDEO: https://youtu.be/Wxn6WevWJdk
According to Brandon Gibb, professor of psychology at Binghamton University and director of the Mood Disorders Institute and Center for Affective Science, the new findings suggest that physiological reactivity to sad stimuli, assessed using pupillometry, serves as one potential biomarker of depression risk among children of depressed mothers. ...
LAST 30 PRESS RELEASES:
[Press-News.org] Ultra-thin, all-inorganic molecular nanowires successfully compounded
