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Preview: Brightsurf Science News :: Nanocrystal News

Nanocrystal Current Events and Nanocrystal News from Brightsurf

Nanocrystal Current Events and Nanocrystal News Events, Discoveries and Articles from Brightsurf

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Project will provide reaction kinetics data for synthesis of metallic nanocrystals

Wed, 27 Dec 17 00:08:20 -0800

Researchers have published the first part of what they expect to be a database showing the kinetics involved in producing colloidal metal nanocrystals -- which are suitable for catalytic, biomedical, photonic and electronic applications -- through an autocatalytic mechanism.

Thermally activated delayed photoluminescence from semiconductor nanocrystals

Mon, 18 Dec 17 00:13:20 -0800

Researchers from North Carolina State University have found that the transfer of triplet excitons from nanomaterials to molecules also creates a feedback mechanism that returns some energy to the nanocrystal, causing it to photoluminesce on long time scales. The mechanism can be adjusted to control the amount of energy transfer, which could be useful in optoelectronic applications.

Quantum dots amplify light with electrical pumping

Mon, 20 Nov 17 00:02:00 -0800

In a breakthrough development, Los Alamos scientists have shown that they can successfully amplify light using electrically excited films of the chemically synthesized semiconductor nanocrystals known as quantum dots.

Nanoscale islands dot light-driven catalyst

Wed, 04 Oct 17 00:06:40 -0700

Rice University scientists have combined aluminum nanoparticles and smaller metal particles to create a versatile nanostructure that could lead to new applications for plasmonics. The Rice technique allows for customizable surface chemistry and reactivity in one material.

Green light for ultra-fine display colors

Wed, 06 Sep 17 00:08:00 -0700

Chemical engineers from ETH Zurich have succeeded in generating ultra-pure green light for the first time. The new light-emitting diode will pave the way for visibly improved color quality in a new generation of ultra-high definition displays for TVs and smartphones.

AI implications: Engineer's model lays groundwork for machine-learning device

Thu, 17 Aug 17 00:14:20 -0700

In what could be a small step for science potentially leading to a breakthrough, an engineer at Washington University in St. Louis has taken steps toward using nanocrystal networks for artificial intelligence applications.

Scientists watch 'artificial atoms' assemble into perfect lattices with many uses

Mon, 31 Jul 17 00:05:30 -0700

Some of the world's tiniest crystals are known as 'artificial atoms' because they can organize themselves into structures that look like molecules, including 'superlattices' that are potential building blocks for novel materials. Now scientists from the Department of Energy's SLAC National Accelerator Laboratory and Stanford University have made the first observation of these nanocrystals rapidly forming superlattices while they are themselves still growing.

Energy storage solution combines polymers and nanosheets

Mon, 31 Jul 17 00:13:10 -0700

A new, lightweight composite material for energy storage in flexible electronics, electric vehicles and aerospace applications has been experimentally shown to store energy at operating temperatures well above current commercial polymers, according to a team of Penn State scientists. This polymer-based, ultrathin material can be produced using techniques already used in industry.

Development of low-dimensional nanomaterials could revolutionize future technologies

Thu, 15 Jun 17 00:10:20 -0700

Javier Vela, scientist at the US Department of Energy's Ames Laboratory, believes improvements in computer processors, TV displays and solar cells will come from scientific advancements in the synthesis of low-dimensional nanomaterials.

Researchers create first significant examples of optical crystallography for nanomaterials

Wed, 17 May 17 00:08:50 -0700

Researchers at the University of Illinois at Urbana-Champaign have developed a novel way to determine crystal type based on optics -- by identifying the unique ways in which these crystals absorb light.

For first time, researchers measure forces that align crystals and help them snap together

Thu, 27 Apr 17 00:04:30 -0700

For the first time, researchers have measured the force that draws tiny crystals together and visualized how they swivel and align. Called van der Waals forces, the attraction provides insights into how crystals self-assemble, an activity that occurs in a wide range of cases in nature, from rocks to shells to bones.

Platelets instead of quantum dots

Tue, 04 Apr 17 00:12:50 -0700

A team of researchers led by ETH Zurich professor David Norris has developed a model to clarify the general mechanism of nanoplatelet formation. Using pyrite, they also managed to confirm their theory.

Chemist awarded Sloan research fellowship

Tue, 21 Feb 17 00:15:40 -0800

Ming Lee Tang, an assistant professor of chemistry at the University of California, Riverside, has been awarded a Sloan Research Fellowship for her research with nanoparticles that could have a strong impact on the solar power industry and biomedical fields.

NASA and MIT Collaborate to develop space-based quantum-dot spectrometer

Tue, 14 Feb 17 00:15:00 -0800

A NASA technologist has teamed with the inventor of a new nanotechnology that could transform the way space scientists build spectrometers, the all-important device used by virtually all scientific disciplines to measure the properties of light emanating from astronomical objects, including Earth itself.

Turning up the heat for perfect (nano)diamonds

Tue, 14 Feb 17 00:08:30 -0800

For use in quantum sensing, the bulk nanodiamond crystal surrounding the point defect must be highly perfect. Any deviation from perfection will adversely affect the quantum behavior of the material. Highly perfect nanodiamonds are also quite expensive and difficult to make. A cheaper alternative, say researchers, is to take defect-ridden, low-quality, commercially manufactured diamonds, and then 'heal' them. In APL Materials, they describe a method to heal diamond nanocrystals under high-temperature conditions.

Highly sensitive gas sensors for volatile organic compound detection

Wed, 01 Feb 17 00:16:00 -0800

A collaboration of researchers in Japan has developed a sensor for volatile organic compound (VOC) detection. Their manufacturing method allows for fine-tuning of SnO2 nanocrystal and pore sizes. Experiments found that a dramatic increase in sensitivity was realized by Pd-loading the sensors. The highly sensitive devices may have a practical use detecting specific biomarkers for medical diagnostics.

Nanocellulose in medicine and green manufacturing

Mon, 07 Nov 16 00:06:50 -0800

American University professor develops method to improve functionality of nanocellulose.

Nanoscale confinement leads to new all-inorganic perovskite with exceptional solar cell properties

Tue, 11 Oct 16 00:00:40 -0700

Scientists with the Energy Department's National Renewable Energy Laboratory for the first time discovered how to make perovskite solar cells out of quantum dots and used the new material to convert sunlight to electricity with 10.77 percent efficiency.

Wi-fi from lasers

Sun, 14 Aug 16 00:02:50 -0700

New fabrication of white light makes data transfer up to 20x faster. Soon we could use normal lighting for our wireless connectivity.

Solar cells for greener and safer energies

Mon, 20 Jun 16 00:07:40 -0700

ICFO researchers report on low-temperature, solution-processed, environmentally friendly inorganic solar cells made with Earth-abundant materials capable of operating with a power conversion of 6.3 percent.

More light on cancer

Thu, 19 May 16 00:06:50 -0700

The group of Russian and French researchers, with the participation of scientists from the Lomonosov Moscow State University, has succeeded to synthesize nanoparticles of ultrapure silicon, which exhibited the property of efficient photoluminescence, i.e., secondary light emission after photoexcitation.

First single-enzyme method to produce quantum dots revealed

Mon, 09 May 16 00:09:40 -0700

Three Lehigh University engineers have successfully demonstrated the first precisely controlled, biological way to manufacture quantum dots using a single-enzyme, paving the way for a significantly quicker, cheaper and greener production method. Their work was recently featured in an article in The New York Times called 'A curious tale of quantum dots.'

A compact, efficient single photon source that operates at ambient temperatures on a chip

Wed, 04 May 16 00:09:20 -0700

Hebrew University of Jerusalem scientists demonstrated a compact, efficient single photon source that can operate on a chip at ambient temperatures. A highly directional single photon source could lead to compact, cheap, and efficient sources of quantum information bits for future quantum technological applications. The team is working on a new generation of devices to allow production of single photons straight from the chip into optical fibers, without any additional optical components.

Adding some salt to the recipe for energy storage materials

Fri, 22 Apr 16 00:13:40 -0700

A team of researchers from Drexel University, Huazhong University of Science and Technology and Tsinghua University recently discovered a way to improve the recipe and make the resulting materials bigger and better and soaking up energy -- the secret? Just add salt.

Quantum dots enhance light-to-current conversion in layered semiconductors

Fri, 08 Apr 16 00:09:10 -0700

Scientists combined the excellent light-harvesting properties of quantum dots with the tunable electrical conductivity of a layered tin disulfide semiconductor to produce a hybrid material that exhibited enhanced light-harvesting and energy transfer properties. The research paves the way for using these materials in optoelectronic applications such as energy-harvesting photovoltaics, light sensors, and light emitting diodes (LEDs).

Penn engineers develop first transistors made entirely of nanocrystal 'inks'

Thu, 07 Apr 16 00:05:40 -0700

University of Pennsylvania engineers have shown a new approach for making transistors and other electrical devices: sequentially depositing their components in the form of liquid nanocrystal 'inks.'

Nanocrystal self-assembly sheds its secrets

Thu, 24 Mar 16 00:08:40 -0700

The secret to a long-hidden magic trick behind the self-assembly of nanocrystal structures is starting to be revealed. The findings were reported in the journal Nature Materials in a paper by Assistant Professor William A. Tisdale and grad student Mark C. Weidman, both at MIT's Department of Chemical Engineering, and Detlef-M. Smilgies at the Cornell High Energy Synchrotron Source.

Nanocage surfaces get 'makeover' in room temperature

Thu, 24 Mar 16 00:04:10 -0700

Kyoto University team exploits preexisting crystal 'molds' to make copper oxide nanocrystals morph into hollow copper sulfide nanocages through anion exchange, and ultimately into cadmium sulfide and zinc sulfide nanocages.

Atomic vibrations in nanomaterials

Wed, 09 Mar 16 00:16:10 -0800

Researchers at ETH have shown for the first time what happens to atomic vibrations when materials are nanosized and how this knowledge can be used to systematically engineer nanomaterials for different applications.

CCNY researchers introduce new route to thermal measurements with nanometer resolution

Mon, 29 Feb 16 00:14:50 -0800

Understanding nanoscale heat flow is critical in the design of integrated electronic devices and in the development of materials for thermal insulation and thermoelectric energy recovery. While several techniques are currently available to observe heat transport over macroscopic distances, there is a need for new methods capable of revealing the dynamics of heat flow with nanometer resolution.

Quantum dot solids: This generation's silicon wafer?

Thu, 25 Feb 16 00:00:00 -0800

Just as the single-crystal silicon wafer forever changed the nature of communication 60 years ago, a group of Cornell researchers is hoping its work with quantum dot solids -- crystals made out of crystals -- can help usher in a new era in electronics.

Story tips from the Department of Energy's Oak Ridge National Laboratory, February 2016

Thu, 04 Feb 16 00:15:20 -0800

Batteries for grid, stationary uses get a boost with new technology; ORNL hosting neuromorphic computing workshop; ORNL part of team developing cleaner biomass cookstove; ORNL has key role in Critical Materials Institute work; Study of nanocrystal growth key to developing new materials; and US coastal populations face potential risks with climate change.

Molecular-like photochemistry from semiconductor nanocrystals

Thu, 21 Jan 16 00:11:50 -0800

Researchers from North Carolina State University have demonstrated the transfer of triplet exciton energy from semiconductor nanocrystals to surface-bound molecular acceptors, extending the lifetime of the originally prepared excited state by six orders of magnitude.

UW team refrigerates liquids with a laser for the first time

Mon, 16 Nov 15 00:14:30 -0800

Since the first laser was invented in 1960, they've always given off heat, either as a useful tool, a byproduct or a fictional way to vanquish intergalactic enemies. University of Washington researchers are the first to solve a decades-old puzzle -- figuring out how to make a laser refrigerate water and other liquids.

Gold-diamond nanodevice for hyperlocalized cancer therapy

Fri, 31 Jul 15 00:07:40 -0700

Precise targeting biological molecules, such as cancer cells, for treatment is a challenge, due to their sheer size. Now, Taiwanese scientists have proposed an advanced solution which can potentially be applied to thermal cancer therapy. An improved sensing technique for nanometer-scale heating and temperature sensing has been published in EPJ QT. Using a chemical method to attach gold nanorods to the surface of a diamond nanocrystal, the authors have invented a new biocompatible nanodevice.

Springer and Tsinghua University Press present the second Nano Research Award

Wed, 29 Jul 15 00:08:40 -0700

Paul Alivisatos, Director of the Lawrence Berkeley National Laboratory and the University of California Berkeley's Samsung Distinguished Professor of Nanoscience and Nanotechnology, has received the second Tsinghua University Press -- Springer Nano Research Award. The award ceremony took place at the 2015 Sino-US Nano Forum, held from June 25-28 in Wuhan, China.

Ultra-thin hollow nanocages could reduce platinum use in fuel cell electrodes

Thu, 23 Jul 15 00:09:50 -0700

A new fabrication technique that produces platinum hollow nanocages with ultra-thin walls could dramatically reduce the amount of the costly metal needed to provide catalytic activity in such applications as fuel cells.

Smarter window materials can control light and energy

Wed, 22 Jul 15 00:08:00 -0700

Chemical engineering professor Delia Milliron and her team have engineered two new advancements in electrochromic materials -- a highly selective cool mode and a warm mode -- not thought possible several years ago. The researchers are one step closer to delivering smart windows with a new level of energy efficiency.

Nanoparticles can be intrinsically left- and right-handed

Tue, 16 Jun 15 00:13:10 -0700

A team of scientists from ITMO University and Trinity College Dublin published first experimental results showing that ordinary nanocrystals possess intrinsic chirality and can be produced under normal conditions as a half-and-half mixture of mirror images of each other. The discovery of this fundamental property in nanocrystals opens new horizons in nano- and bio-technology and medicine, for instance, for such applications as targeted drug delivery. The results of the study were published in Nano Letters.

Nanoscale worms provide new route to nano-necklace structures

Fri, 27 Mar 15 00:05:50 -0700

Researchers have developed a novel technique for crafting nanometer-scale necklaces based on tiny star-like structures threaded onto a polymeric backbone. The technique could provide a new way to produce hybrid organic-inorganic shish kebab structures from semiconducting, magnetic, ferroelectric and other materials that may afford useful nanoscale properties.

Toward a more realistic picture of how molecules move within cells

Mon, 23 Mar 15 00:00:40 -0700

A candid photo can reveal much more about the mood of a party than a stiff, posed picture. The same might be true for molecules, according to researchers. In a report appearing in the journal ACS Central Science, they report use of a newly developed method that can take a candid snapshot of how molecules really move in vitro and in cells. This information could help resolve some controversial claims about how nanocrystals assemble.

More study needed to clarify impact of cellulose nanocrystals on health

Mon, 09 Mar 15 00:07:20 -0700

Biocompatible and biodegradable, cellulose materials are being studied for use in high-performance composites and optical films, and to deliver medicine in pills. But before a material can be commercialized, its impact on human health must be determined.

Potential toxicity of cellulose nanocrystals examined in Industrial Biotechnology journal

Thu, 19 Feb 15 00:13:50 -0800

Novel nanomaterials derived from cellulose have many promising industrial applications, are biobased and biodegradable, and can be produced at relatively low cost. Their potential toxicity -- whether ingested, inhaled, on contact with the skin, or on exposure to cells within the body -- is a topic of intense discussion, and the latest evidence and insights on cellulose nanocrystal toxicity are presented in a Review article in Industrial Biotechnology.

Demystifying nanocrystal solar cells

Wed, 28 Jan 15 00:09:10 -0800

ETH researchers have developed a comprehensive model to explain how electrons flow inside new types of solar cells made of tiny crystals. The model allows for a better understanding of such cells and may help to increase their efficiency.

New superconducting hybrid crystals developed at University of Copenhagen

Mon, 12 Jan 15 00:09:50 -0800

A new type of 'nanowire' crystals that fuses semiconducting and metallic materials on the atomic scale could lay the foundation for future semiconducting electronics. Researchers at the University of Copenhagen are behind the breakthrough, which has great potential.

UO-industry collaboration points to improved nanomaterials

Thu, 20 Nov 14 00:14:00 -0800

A potential path to identify imperfections and improve the quality of nanomaterials for use in next-generation solar cells has emerged from a collaboration of University of Oregon and industry researchers.

Shaping the future of nanocrystals

Thu, 21 Aug 14 00:09:00 -0700

Berkeley Lab researchers have recorded the first direct observations of how facets form and develop on platinum nanocubes in solution, pointing the way towards more sophisticated and effective nanocrystal design and revealing that a nearly 150-year-old scientific law describing crystal growth breaks down at the nanoscale.

Unexpected water explains surface chemistry of nanocrystals

Thu, 29 May 14 00:02:40 -0700

Berkeley Lab researchers have found unexpected traces of water in semiconducting nanocrystals that helps answer long-standing questions about their surface chemistry.

Luminescent nanocrystal tags enable rapid detection of multiple pathogens in a single test

Wed, 07 May 14 00:00:50 -0700

A research team using tunable luminescent nanocrystals as tags to advance medical and security imaging have successfully applied them to high-speed scanning technology and detected multiple viruses within minutes.

Probing dopant distribution

Fri, 02 May 14 00:02:30 -0700

Berkeley Lab researchers at the Molecular Foundry have shown that when doping a semiconductor to alter its electrical properties, equally important as the amount of dopant is how the dopant is distributed on the surface and throughout the material.