Making cheaper, biocompatible E-skin electrodes
(DGIST (Daegu Gyeongbuk Institute of Science and Technology)) DGIST materials scientists and colleagues in Korea have improved electrical conductivity in a polymer electrode for E-skin applications. Their approach is simple and cheap, but further enhancements are needed for the polymer to become a viable alternative to more expensive gold electrodes. The scientists published their findings in the journalBiosensors and Bioelectronics. (Source: EurekAlert! - Biology)
Source: EurekAlert! - Biology - December 10, 2020 Category: Biology Source Type: news
Reversible planar gliding and microcracking in a single-crystalline Ni-rich cathode
High-energy nickel (Ni)–rich cathode will play a key role in advanced lithium (Li)–ion batteries, but it suffers from moisture sensitivity, side reactions, and gas generation. Single-crystalline Ni-rich cathode has a great potential to address the challenges present in its polycrystalline counterpart by reducing phase boundaries and materials surfaces. However, synthesis of high-performance single-crystalline Ni-rich cathode is very challenging, notwithstanding a fundamental linkage between overpotential, microstructure, and electrochemical behaviors in single-crystalline Ni-rich cathodes. We observe reversible...
Source: ScienceNOW - December 10, 2020 Category: Science Authors: Bi, Y., Tao, J., Wu, Y., Li, L., Xu, Y., Hu, E., Wu, B., Hu, J., Wang, C., Zhang, J.-G., Qi, Y., Xiao, J. Tags: Materials Science reports Source Type: news
Monolithic perovskite/silicon tandem solar cell with >29% efficiency by enhanced hole extraction
We report a monolithic perovskite/silicon tandem with a certified power conversion efficiency of 29.15%. The perovskite absorber, with a bandgap of 1.68 electron volts, remained phase-stable under illumination through a combination of fast hole extraction and minimized nonradiative recombination at the hole-selective interface. These features were made possible by a self-assembled, methyl-substituted carbazole monolayer as the hole-selective layer in the perovskite cell. The accelerated hole extraction was linked to a low ideality factor of 1.26 and single-junction fill factors of up to 84%, while enabling a tandem open-ci...
Source: ScienceNOW - December 10, 2020 Category: Science Authors: Al-Ashouri, A., Köhnen, E., Li, B., Magomedov, A., Hempel, H., Caprioglio, P., Marquez, J. A., Morales Vilches, A. B., Kasparavicius, E., Smith, J. A., Phung, N., Menzel, D., Grischek, M., Kegelmann, L., Skroblin, D., Gollwitzer, C., Malinauskas, Tags: Engineering, Materials Science r-articles Source Type: news
Cracking the problem of cracking cathodes
(Source: ScienceNOW)
Source: ScienceNOW - December 10, 2020 Category: Science Authors: Lavine, M. S. Tags: Materials Science twis Source Type: news
Efficiency from hole-selective contacts
(Source: ScienceNOW)
Source: ScienceNOW - December 10, 2020 Category: Science Authors: Szuromi, P. Tags: Engineering, Materials Science twis Source Type: news
Hydrogels with fine-toothed molecular combs may make enduring glucose-monitoring implants
(Texas A&M University) In a new study, published online in the journal American Chemical Society (ACS) Applied Polymer Materials, scientists at Texas A&M University reported they have designed a hydrogel membrane that may be used to house optical glucose sensing materials, toward building a biosensor for monitoring sugar levels in diabetics. (Source: EurekAlert! - Medicine and Health)
Source: EurekAlert! - Medicine and Health - December 9, 2020 Category: International Medicine & Public Health Source Type: news
Formlabs Launches Permanent Crown Resin, Further Digitizing Restorative Dentistry
Formlabs introduces Permanent Crown Resin, a cutting edge, lower cost alternative to chairside milling, and Soft Tissue Starter Pack to empower dentists to provide a better patient experience.Somerville, MA - December 8, 2020 – F ormlabs, a leading 3D printing company, today announced the expansion of its dental material offerings with the launch of Permanent Crown Resin and Soft Tissue Starter Pack. The introduction of these new materials empowers dental offices and labs to further digitize resto rative dentistry and offer patients 3D printed long-term restorations such as fillings, cro...
Source: Dental Technology Blog - December 8, 2020 Category: Dentistry Source Type: news
John Mitchell obituary
My father, John Mitchell, who has died aged 75, was the founder of Carbohydrate Polymers, a scientific journal which grew from humble roots to become one of the publisher Elsevier ’s lead journals. John recognised the need for this much-needed outlet for research into polysaccharide science – the branch of food technology focused on the carbohydrates found most often in plants, algae and micro-organismsBorn in north London, the son of Albert Mitchell, who was in charge of general election campaigns for the Conservative party, and Marjorie (nee Woodcock), a homemaker, John attended the Haberdasher ’s Aske’s school f...
Source: Guardian Unlimited Science - December 7, 2020 Category: Science Authors: Johanna Mitchell Tags: Food science Physics Publishing & drink industry Source Type: news
Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors
Resolving momentum degrees of freedom of excitons, which are electron-hole pairs bound by the Coulomb attraction in a photoexcited semiconductor, has remained an elusive goal for decades. In atomically thin semiconductors, such a capability could probe the momentum-forbidden dark excitons, which critically affect proposed opto-electronic technologies but are not directly accessible using optical techniques. Here, we probed the momentum state of excitons in a tungsten diselenide monolayer by photoemitting their constituent electrons and resolving them in time, momentum, and energy. We obtained a direct visual of the momentu...
Source: ScienceNOW - December 3, 2020 Category: Science Authors: Madeo, J., Man, M. K. L., Sahoo, C., Campbell, M., Pareek, V., Wong, E. L., Al-Mahboob, A., Chan, N. S., Karmakar, A., Mariserla, B. M. K., Li, X., Heinz, T. F., Cao, T., Dani, K. M. Tags: Materials Science, Physics reports Source Type: news
Probing the dark state
(Source: ScienceNOW)
Source: ScienceNOW - December 3, 2020 Category: Science Authors: Osborne, I. S. Tags: Materials Science, Physics twis Source Type: news
Driving the pores away
(Source: ScienceNOW)
Source: ScienceNOW - November 26, 2020 Category: Science Authors: Grocholski, B. Tags: Engineering, Materials Science twis Source Type: news
Critical instability at moving keyhole tip generates porosity in laser melting
Laser powder bed fusion is a dominant metal 3D printing technology. However, porosity defects remain a challenge for fatigue-sensitive applications. Some porosity is associated with deep and narrow vapor depressions called keyholes, which occur under high-power, low–scan speed laser melting conditions. High-speed x-ray imaging enables operando observation of the detailed formation process of pores in Ti-6Al-4V caused by a critical instability at the keyhole tip. We found that the boundary of the keyhole porosity regime in power-velocity space is sharp and smooth, varying only slightly between the bare plate and powde...
Source: ScienceNOW - November 26, 2020 Category: Science Authors: Zhao, C., Parab, N. D., Li, X., Fezzaa, K., Tan, W., Rollett, A. D., Sun, T. Tags: Engineering, Materials Science reports Source Type: news
38 UCLA scientists among world ’s most influential researchers
This article was updated on Nov. 24 and again on Dec. 3 because Clarivate had incorrectly identified two of the researchers’ academic affiliations.Thirty-eight UCLA scholars have been named among the world ’s most influential scientific researchers.Clarivate released its annual list of the most highly cited researchers, which includes dozens of UCLA scientists across various disciplines. The list is compiled by the Institute for Scientific Information at Clarivate using data based on scholarly publication counts and citation indexes. The selected researchers wrote publications that ranked in the top 1% by citations in ...
Source: UCLA Newsroom: Health Sciences - November 23, 2020 Category: Universities & Medical Training Source Type: news
37 UCLA scientists among world ’s most influential researchers
Editor ’s note: This story was changed on Nov. 24 to 37 UCLA scholars, after learning that Clarivate incorrectly identified a professor’s affiliation with their previous institution.Thirty-seven UCLA scholars have been named as the world ’s most influential scientific researchers.Clarivate released its annual list of the most highly cited researchers, which includes dozens of UCLA scientists across various disciplines. The list is compiled by the Institute for Scientific Information at Clarivate using data based on scholarly publication counts and citation indexes. The selected researchers wrote publications that ran...
Source: UCLA Newsroom: Health Sciences - November 23, 2020 Category: Universities & Medical Training Source Type: news
36 UCLA scientists among world ’s most influential researchers
Thirty-six UCLA scholars have been named as the world ’s most influential scientific researchers.Clarivate released its annual list of the most highly cited researchers, which includes dozens of UCLA scientists across various disciplines. The list is compiled by the Institute for Scientific Information at Clarivate using data based on scholarly publication counts and citation indexes. The selected researchers wrote publications that ranked in the top 1% by citations in their field for that year, according to the Web of Science citation index.TheUCLA Samueli School of Engineering hadeight faculty members named among the w...
Source: UCLA Newsroom: Health Sciences - November 23, 2020 Category: Universities & Medical Training Source Type: news
