6733期

最新文章

• Transforming achiral semiconductors into chiral domains with exceptional circular dichroism AI翻译
  作者：Ugras, Thomas J.; Carson, River B.; Lynch, Reilly P.; Li, Haoyang; Yao, Yuan; Cupellini, Lorenzo; Page, Kirt A.; Wang, Da; Arbe, Arantxa; Bals, Sara; Smieska, Louisa; Woll, Arthur R.; Arteaga, Oriol; Javorfi, Tamas; Siligardi, Giuliano; Pescitelli, Gennaro; Weinstein, Steven J.; Robinson, Richard D.
  作者单位：Cornell University; Cornell University; University of Pisa; Cornell University; University of Antwerp; University of Barcelona; Diamond Light Source; Rochester Institute of Technology; CIC biomaGUNE
  摘要：Highly concentrated solutions of asymmetric semiconductor magic-sized clusters (MSCs) of cadmium sulfide, cadmium selenide, and cadmium telluride were directed through a controlled drying meniscus front, resulting in the formation of chiral MSC assemblies. This process aligned their transition dipole moments and produced chiroptic films with exceptionally strong circular dichroism. G-factors reached magnitudes as high as 1.30 for drop-cast films and 1.06 for patterned films, approaching theore...
• New administration upends US science AI翻译
  作者：Brainard, Jeffery
• Nondeterministic dynamics in the η-to-θ phase transition of alumina nanoparticles AI翻译
  作者：Sakakibara, Masaya; Hanaya, Minoru; Nakamuro, Takayuki; Nakamura, Eiichi
  作者单位：University of Tokyo; Gunma University
  摘要：Phase diagrams and crystallography are standard tools for studying structural phase transitions, whereas acquiring kinetic information at the atomistic level has been considered essential but challenging. The eta-to-theta phase transition of alumina is unidirectional in bulk and retains the crystal lattice orientation. We report a rare example of a statistical kinetics study showing that for nanoparticles on a bulk Al(OH)(3) surface, this phase transition occurs nondeterministically through an...
• NEXTGEN VOICES: RESEARCH SAFEGUARDS AI翻译
  作者：Sills, Jennifer
• EXPERTS UPROOTED AI翻译
  作者：Mervis, Jeffrey
  摘要：A small statistical agency within the U.S. Department of Agriculture was torn apart under Trump-and then rebuilt. What did it lose, and what can other U.S. research agencies learn from it?
• Energetic constraints drive the decline of a sentinel polar bear population AI翻译
  作者：Archer, Louise C.; Atkinson, Stephen N.; Lunn, Nicholas J.; Penk, Stephanie R.; Molnar, Peter K.
  作者单位：University of Toronto; University Toronto Scarborough; Environment & Climate Change Canada; Canadian Wildlife Service; Wildlife Research Division - Environment Canada; University of Toronto; University of Montana System; University of Montana; United States Department of the Interior; United States Geological Survey
  摘要：Human-driven Arctic warming and resulting sea ice loss have been associated with declines in several polar bear populations. However, quantifying how individual responses to environmental change integrate and scale to influence population dynamics in polar bears has yet to be achieved. We developed an individual-based bioenergetic model and hindcast population dynamics across 42 years of observed sea ice conditions in Western Hudson Bay, a region undergoing rapid environmental change. The mode...
• AI expert falls victim to AI AI翻译
  作者：Brainard, Jeffrey
• Institute head settles lawsuit AI翻译
  作者：Brainard, Jeffrey
• Humans: A Monstrous History AI翻译
  作者：Finn, Ed
  作者单位：Arizona State University; Arizona State University-Tempe
• Scratching more than an itch AI翻译
  作者：Ver Heul, Aaron
  作者单位：Washington University (WUSTL)