Results 301 to 310 of about 5,995,934 (373)

The Role of Optical Centers in Neodymium‐Doped Calcium Fluoride: Optical Tagging and Nanothermometry in the Second Biological Window

open access: yesAdvanced Optical Materials, EarlyView.
Tuning excitation by only 6 nm unveils three distinct optical centres in CaF2:Nd3⁺,Y3⁺, each with unique spectral fingerprints. Some exhibit properties ideal for precise nanoscale temperature sensing. Abstract Nd3+ has been proposed for nanothermometry in biological media, as both its emission and excitation wavelengths fall within the regions of low ...
Pablo Camarero   +5 more
wiley   +1 more source

Multimodal Luminescence from LaAlO3:Eu3+ via Trap Modulation for High‐Temperature Applications

open access: yesAdvanced Photonics Research, EarlyView.
LaAlO3:Eu3+ (LAO:E) phosphor exhibiting multimode luminescence enabled by multilevel traps spanning shallow to deep states is reported. These traps ensure controlled charge storage and release at room and elevated temperatures. Experimental studies and theoretical calculations reveal the trapping–detrapping mechanism, highlighting LAO:E as a promising ...
Abdulelah Alolayan   +3 more
wiley   +1 more source

Ni Single Atoms in Zeolite Beta for Selective Alkyne Hydrogenation

open access: yesAdvanced Sustainable Systems, EarlyView.
Single‐atom Ni in zeolite Beta (Ni1/BEA) selectively remove trace acetylene from ethylene. Ni1/BEA achieve full conversion with ≈89% ethylene selectivity, stable for 24 h without coking, and 12 times higher TOF than prior zeolite‐supported single‐atom Ni catalysts. Na+ exchange suppress Brønsted acid‐catalyzed oligomerization. Under ethylene‐rich feeds,
Essa Alhashmi   +2 more
wiley   +1 more source

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