Current Doping News and Events

Current Doping News and Events, Doping News Articles.
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New way to control electrical charge in 2D materials: Put a flake on it
Gaining control of the flow of electrical current through atomically thin materials is important to potential future applications in photovoltaics or computing. Physicists in Arts & Sciences at Washington University in St. Louis have discovered one way to locally add electrical charge to a graphene device. (2021-01-14)

Sustainable transportation: clearing the air on nitrogen doping
Researchers from the University of Tsukuba elucidated the initial reaction pathways on the pyridinic nitrogen atoms at the armchair edges of doped carbon catalysts for the oxygen reduction reaction in proton-exchange membrane fuel cells. This will help optimize a low-carbon technology for future transportation needs. (2021-01-12)

Liquid metal ink liberates form
POSTECH-Yonsei University joint research team develops liquid metal ink for 3D circuit lines. (2021-01-10)

USTC develops ultrahigh-performance plasmonic metal-oxide materials
In a study published in Advanced Materials, the researchers from Hefei National Laboratory for Physical Sciences at the Microscale, the University of Science and Technology of China of the Chinese Academy of Sciences, using an electron-proton co-doping strategy, invented a new metal-like semiconductor material with excellent plasmonic resonance performance. (2021-01-08)

Detecting CRISPR/Cas gene doping
All athletes want to be at the top of their game when they compete, but some resort to nefarious approaches to achieve peak muscle growth, speed and agility. Recent developments in gene editing technology could tempt athletes to change their DNA to get an edge. Now, researchers reporting in ACS' Analytical Chemistry demonstrate first steps toward detecting this type of doping both in human plasma and in live mice. (2021-01-06)

Quantum insulators create multilane highways for electrons
A team of researchers from Penn State has experimentally realized a quantum phenomenon in a multilayered insulator, essentially producing a multilane highway for the transport of electrons that could increase the speed and efficiency of information transfer without energy loss. (2020-12-16)

Potential extreme condition history detector - recoverable PL achieved in pyrochlore
Photoluminescence (PL) is light emission from a substance after the absorption of photons stimulated by temperature, electricity, pressure, or chemistry doping. An international team of scientists led by Dr. Wenge Yang from Center for High Pressure Science &Technology Advanced Research (HPSTAR) presents a strong tricolor PL achieved in non-PL pyrochlore Ho2Sn2O7 through high pressure treatment. Interestingly the PL can be much enhanced after pressure release and recovered to ambient conditions. Their study is published in the recent issue of Physical Review Letters. (2020-12-11)

Double element co-doped carbon quantum dots enhance photocatalytic efficiency
In a paper published in NANO, researchers from Nanjing Tech University proposed a theory which attributes the photocatalytic efficiency enhancement of Phosphorus and Nitrogen co-doped CQDs (PNCQDs)/TiO2 nanosheets composite photocatalyst to the quantum wells of PNCQDs. (2020-12-10)

Multiple semiconductor type switching to boost thermoelectric conversion of waste heat
Scientists at Tokyo Tech demonstrate double charge carrier type switching of tin SnSe semiconductor by doping of antimony Sb. The SnSe carrier type switches from p-type to n-type, and re-switches to p-type as doping increases, due to the switching of major Sb substitution site from Se to Sn, promising reliable charge polarity control, leading to realization of SnSe-based p/n homojunction thermoelectric device for converting waste heat into electricity and new insights on impurity doping of compound semiconductors. (2020-12-09)

A colossal step for electronics
Scientists at Osaka University have created a thin-film resistor with a conductivity that can be controlled by exposing it to hydrogen and an external electric field. This work may lead to new gas sensors, as well as advanced materials that can dynamically respond to changes in the environment. (2020-12-08)

Anti-doping education: Teaching athletes about morality in sport can help reduce doping
Elite athletes can be persuaded not to take banned substances - either by appealing to their sense of morality or educating them about the risks of using performance-enhancing drugs, according to a new study. (2020-12-02)

UCF researcher zeroes in on critical point for improving superconductors
Developing a practical ''room temperature'' superconductor is a feat science has yet to achieve. However a UCF researcher and his colleagues are working to move this goal closer to realization by taking a closer look at what is happening in ''strange'' metals. The research was published recently in the journal Communications Physics - Nature. (2020-11-23)

UT researchers establish proof of principle in superconductor study
Three physicists in the Department of Physics and Astronomy at the University of Tennessee, Knoxville, together with their colleagues from the Southern University of Science and Technology and Sun Yat-sen University in China, have successfully modified a semiconductor to create a superconductor, which may lead to unforeseen advancements in technology. (2020-11-18)

Taking charge to find the right balance for advanced optoelectronic devices
Heterojunction structures composed of 2D materials are useful for designing advanced energy devices. In a new study, researchers from Daegu Gyeongbuk Institute of Science and Technology, Korea, find a way that makes it easier to build heterojunction structures. They used a technique that enabled them to dig deeper into how charge properties of the device can be regulated. (2020-11-16)

Clemson researchers decode thermal conductivity with light
Clemson researchers examine a highly efficient thermoelectric material in a new way - by using light. (2020-11-09)

Light-modulated graphene-organic heterojunction transistors realizing photocurrent logic changes
The optical intermodulation and graphene removing doping modulation proposed in this paper provide a reference for the future fabrication of graphene-based all-optical input photodetectors and photoelectric modulation devices, as well as positive and negative logic photocurrents modulated by utilizing critical value of effective exciton length. This logical reversal light modulation photoresponse opens up a new path for the direction of photocurrent and polarity modulation in the future. (2020-11-01)

Promising strategies for durable perovskite solar cells
Perovskite materials are increasingly popular as the active layer in solar cells, but internal forces in these materials cause distortions in their crystal structures, reducing symmetry and contributing to their intrinsic instability. Researchers at Soochow University examined the mechanisms at play, as well as several degradation factors that influence the performance of perovskite photovoltaics. In APL Materials, they clarified the factors influencing the degradation and they summarized some feasible approaches for durable perovskite photovoltaics. (2020-10-27)

Powering the future: new insights into how alkali-metal doped flexible solar cells work
A group of scientists from Korea has discovered that the amount of alkali metal introduced into crystals of flexible thin-film solar cells influences the path that charge carriers take to traverse between electrodes, thereby affecting the light-to-electricity conversion efficiency of the solar cell. Given the immense application potential that such solar cells have today, this finding could be key to ushering in a green future. (2020-10-26)

OPD optical sensors that reproduce any color
POSTECH Professor Dae Sung Chung's team uses chemical doping to freely control the colors of organic photodiodes. (2020-10-21)

Oxygen can do a favor to synthesize metal-organic frameworks
IBS scienetists have identified how oxygen affects the synthesis of a novel metal-organic framework. (2020-10-21)

Sprinkled with power: How impurities enhance a thermoelectric material at the atomic level
Magnesium silicide (Mg2Si) is a thermoelectric material that can convert heat into electricity. Though it is known that adding antimony impurities enhances the performance of Mg2Si, the mechanisms underlying this effect are unclear. Now, scientists from Japan shed light on the effects of these impurities at the atomic level, taking us closer to arriving at a practical way of efficiently harvesting waste heat from cars and thermal power plants to produce clean energy. (2020-10-15)

Athletes using sport supplements are more open to doping -- study
Athletes using legal performance enhancing and medical sport supplements are more likely to dope than those using sport foods and superfoods, a new study reveals. (2020-10-08)

Energy-harvesting plastics pass the acid test
Air-stable coatings can improve the longevity of wearable devices that tap into body heat. (2020-10-06)

Ultrahigh energy density transition-metal-free cathodes designed by band structure engineering
An effective strategy for tuning the electrochemical potentials of carbonaceous electrodes is proposed, which can dramatically shift-down the Fermi level of systems to enhance the electrochemical potentials as well as improve structural stabilities. The average Li+ intercalation potential of the newly designed LiBCF2/LiB2C2F2 cathodes reach 3.49/3.63 V, delivering the record-breaking high energy densities of 1379.9/1073.8 Wh kg?1. This work guides the design of next-generation transition-metal-free cathode materials through band structure engineering. (2020-09-15)

Memory in a metal, enabled by quantum geometry
Berkeley researchers led by Professor Xiang Zhang in collaboration with a Stanford University team invented a new data storage method by making odd numbered layers slide relative to even-number layers in tungsten ditelluride, which is only 3nm thick. The arrangement of these atomic layers represents 0 and 1 for data storage. The researchers make use of quantum geometry to read information out. This material platform works ideally for memory, with independent 'write' and 'read' operation. (2020-09-01)

Red, green and blue single-mode lasing in heterogeneously coupled system
Tunable microlasers that span the full visible spectrum, particularly red, green and blue (RGB)colors, are of crucial importance for various optical devices. Towards this goal, scientist in China proposed a heterogeneously coupled structure composed of three spherical microcavities. With each resonator serving as lasing source and filter simultaneously, tunable red, green and blue lasing was demonstrated. The strategy will not only provide new insight into the mode selection mechanism but also support the innovation of photonic units in optoelectronic system. (2020-08-30)

Scientists unveil nature of active site in nitrogen-doped carbon for electrocatalytic CO2 reduction
A research group led by Prof. DENG Dehui from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) unveiled the nature of the active site in N-doped carbon materials for the electrocatalytic CO2 reduction to CO. (2020-08-12)

Giant photothermoelectric effect in silicon nanoribbon photodetectors
The photoelectric conversion has essential applications in energy and information devices. It is reported that up to 40% of the energy loss comes from heat dissipation and poor light absorption. Chinese and American scientists have successfully realized the giant photothermoelectric effect in silicon nanomaterials, which can harvest the excessive energy of photogenerated hot carriers and is promising for the high-efficiency photovoltaic cells and photodetectors by silicon materials. (2020-08-11)

Upcycling plastic waste toward sustainable energy storage
UC Riverside engineering professors Mihri and Cengiz Ozkan and their students have been working for years on creating improved energy storage materials from sustainable sources, such as glass bottles, beach sand, Silly Putty, and portabella mushrooms. Now they have turned plastic soda bottles into a nanomaterial for use in batteries. Though they don't store as much energy as lithium-ion batteries, supercapacitors made with the material can charge much faster. (2020-08-11)

Scientists discover new class of semiconducting entropy-stabilized materials
The design of novel materials with superior characteristics by entropy stabilization is a very dynamic emerging research area in materials science. However, despite recent advances in entropy-stabilized metals and insulating ceramics targeted for structural applications, there is still a dearth of high-entropy semiconductors, which poses a major obstacle for the adoption of high-entropy materials in semiconducting functional applications. Our study aims to realize a novel class of the semiconducting entropy-stabilized chalcogenide alloys. (2020-07-31)

Electrochemical doping: researchers improve carbon nanotube transparent conductors
Skoltech researchers and their colleagues from Aalto University have discovered that electrochemical doping with ionic liquid can significantly enhance the optical and electrical properties of transparent conductors made of single-walled carbon nanotube films. (2020-07-29)

'Etch-a-Sketching' critical p-n nano-junctions for 2D Semiconductor diode
Elisa Riedo, professor at the New York University (NYU) Tandon school of Engineering led an international team that used thermal scanning probe lithography (t-SPL) to fabricate state-of-the-art ''p-n junctions'' on a single atomic layer of molybdeunum disulfide (MoS2) a transition metal dichalcogenide. The work, 'Spatial defects nanoengineering for bipolar conductivity in MoS2,' appears in Nature Communications. (2020-07-28)

Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications
Optically- and electrically- driven mid-infrared (MIR) light-emitting devices are realized in a simple but novel van der Waals (vdW) heterostructure, constructed from thin-film black phosphorus (BP) and transition-metal dichalcogenides (TMDC). This work suggests that vdW heterostructure is a promising platform for mid-infrared research and applications. (2020-07-10)

Using Epo against Covid-19
The doping agent erythropoietin could attenuate severe progression of COVID-19. (2020-07-06)

Scientists use a Teflon pipe to make a cheap, simple reactor for silica particle synthesis
The synthesis of silica particles, used in bioimaging and drug delivery, could become considerably cheaper and more efficient by adopting a new flow synthesis method demonstrated by researchers in Australia and China, which involves a spiral channel and simple Teflon pipe to promote the rapid mixing of precursor fluids. (2020-07-01)

Scientists develop N-doped self-cleaning membranes that use visible light irradiation
Researchers from the Institute of Process Engineering (IPE) of the Chinese Academy of Sciences and Argonne National Laboratory (Argonne) in the U.S. have recently employed atomic layer deposition (ALD) to fabricate visible light-activated membranes that efficiently utilize solar energy. (2020-06-30)

Alternative to nitrogen: Oxygen plasma can improve the properties of electrode materials
A group of scientists from Skoltech and Lomonosov Moscow State University (MSU) showed that nitrogen is not the only element that can help enhance the specific capacitance of supercapacitors. (2020-06-25)

A salt solution toward better bioelectronics
A water-stable dopant enhances and stabilizes the performance of electron-transporting organic electrochemical transistors. (2020-06-14)

Russian scientists demonstrate ion implantation advantages for the use of silicon in optoelectronics
Silicon is the main material in electronic engineering. All information and computing technologies that play a key role in modern civilization are based on silicon: computers, communications, astronautics, biomedicine, robotics and much more. (2020-06-05)

Counterintuitive phase behavior observed in isotopic hydrogen (H2-HD-D2) alloy
A joint team from the Institute of Solid State Physics of the Hefei Institutes of Physical Science, collaborating with researchers from the Center for High Pressure Science & Technology Advanced Research and University of Edinburgh, has reported a new discovery in which they found counterintuitive effects of isotopic doping on the phase diagram of H2-HD-D2 molecular alloy. (2020-06-03)

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