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Nanophotonic inspection of deep-subwavelength integrated optoelectronic chips.
Sci Adv
January 2025
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.
Artificial nanostructures with ultrafine and deep-subwavelength features have emerged as a paradigm-shifting platform to advanced light-field management, becoming key building blocks for high-performance integrated optoelectronics and flat optics. However, direct optical inspection of integrated chips remains a missing metrology gap that hinders quick feedback between design and fabrications. Here, we demonstrate that photothermal nonlinear scattering microscopy can be used for direct imaging and resolving of integrated optoelectronic chips beyond the diffraction limit.
View Article and Find Full Text PDFInternal Nanocavity Regulation of Embedded Rare Earth Up-Conversion Nanoparticles for HO Production Operable at Up to 780 nm.
Small
January 2025
XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Semiconductor photocatalysts embedded with rare earth upconversion nanoparticles (REUPs) are a promising strategy to improve their photoresponse range, but their photocatalytic performance within the near-infrared (NIR) region is far from satisfactory. Here, a method is reported to improve the photocatalytic activity by adjusting the nanocavity of upconversion nanoparticles inside a semiconductor. Two types of CdS embedded with NaYF:Yb,Er photocatalysts with core-shell structure (no cavity) (NYE/CdS) and yolk-shell structure (empty cavity) (NYE@CdS) are synthesized by different methods.
View Article and Find Full Text PDFOne-Pot Synthesis and Enhanced Vis-NIR Photocatalytic Activity of NiTiO/TiO Templated by Waste Tobacco Stem-Silks.
Nanomaterials (Basel)
January 2025
School of Chemical Sciences & Technology, School of Materials and Energy, Yunnan Provincial Center of Technology Innovation for New Materials and Equipment in Water Pollution Control, Institute of International Rivers and Eco-Security, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China.
Synthesis of the photocatalysts with near-infrared light response usually involves upconversion materials or plasmon-assisted noble metals. Herein, NiTiO/TiO was synthesized by using waste tobacco stem-silks as biotemplates and tetra-tert-butyl orthotitanate and nickel nitrate as precursors in a one-pot procedure. NiTiO(1.
View Article and Find Full Text PDFProperties, Antioxidant and Antibacterial Activity of Southern Meagre Fish () Skin Gelatin Reinforced with Clove Bud Extract.
Gels
January 2025
Fisheries Department, Faculty of Marine Sciences, Chabahar Maritime University, Chabahar 9971778631, Iran.
The properties of biopolymer films prepared using Southern meagre fish () skin gelatin blends, both with and without clove bud extract (CE) at concentrations of 0.3% and 0.7%, were investigated.
View Article and Find Full Text PDFRed-light mediated formylation of indoles using a helical carbenium ion as a photoredox catalyst.
Chem Commun (Camb)
January 2025
Department of Chemistry, Indian Institute of Technology Ropar (IIT Ropar), Rupnagar, Punjab-140 001, India.
Low-energy photoredox catalysis has gained significant attention in developing organic transformations due to its ability to achieve high penetration depth and minimum health risks. Herein, we disclose a red-light ( = 640 nm)-mediated C-3 formylation of indoles utilizing a helical carbenium ion as a photocatalyst and 2,2-dimethoxy-,-dimethylethanamine as a formylating source. These protocols exhibit a broad substrate scope under mild conditions with efficient scalability for the synthesis of C-3 formylated indoles.
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