scholarly journals Shining NIR light on ivory: A practical enforcement tool for elephant ivory identification

2021 ◽  
Author(s):  
Apinya Chaitae ◽  
Ronnarit Rittiron ◽  
Iain J. Gordon ◽  
Helene Marsh ◽  
Jane Addison ◽  
...  
Keyword(s):  
Nir Light ◽  
Elephant Ivory

Catalyst Halogenation Enables Rapid and Efficient Polymerizations with Visible to Near-Infrared Light

2020 ◽  
Author(s):  
Alex Stafford ◽  
Dowon Ahn ◽  
Emily Raulerson ◽  
Kun-You Chung ◽  
Kaihong Sun ◽  
...  
Keyword(s):  
Near Infrared ◽  
Transient Absorption ◽  
Reaction Times ◽  
Infrared Light ◽  
Structure Property ◽  
Light Emitting ◽  
Structure Property Relationships ◽  
Nir Light ◽  
Light Intensities ◽  
Emission Quenching

Driving rapid polymerizations with visible to near-infrared (NIR) light will enable nascent technologies in the emerging fields of bio- and composite-printing. However, current photopolymerization strategies are limited by long reaction times, high light intensities, and/or large catalyst loadings. Improving efficiency remains elusive without a comprehensive, mechanistic evaluation of photocatalysis to better understand how composition relates to polymerization metrics. With this objective in mind, a series of methine- and aza-bridged boron dipyrromethene (BODIPY) derivatives were synthesized and systematically characterized to elucidate key structure-property relationships that facilitate efficient photopolymerization driven by visible to NIR light. For both BODIPY scaffolds, halogenation was shown as a general method to increase polymerization rate, quantitatively characterized using a custom real-time infrared spectroscopy setup. Furthermore, a combination of steady-state emission quenching experiments, electronic structure calculations, and ultrafast transient absorption revealed that efficient intersystem crossing to the lowest excited triplet state upon halogenation was a key mechanistic step to achieving rapid photopolymerization reactions. Unprecedented polymerization rates were achieved with extremely low light intensities (< 1 mW/cm<sup>2</sup>) and catalyst loadings (< 50 μM), exemplified by reaction completion within 60 seconds of irradiation using green, red, and NIR light-emitting diodes.

Bi19S27I3 nanorods: a new candidate for photothermal therapy in the first and second biological near-infrared windows

Nanoscale ◽  
2021 ◽  
Author(s):  
Jinsong Xiong ◽  
Qinghuan Bian ◽  
Shuijin Lei ◽  
Yatian Deng ◽  
Kehan Zhao ◽  
...  
Keyword(s):  
Cancer Therapy ◽  
Photothermal Therapy ◽  
Near Infrared ◽  
Research Interest ◽  
The Past ◽  
Nir Light ◽  
Considerable Research ◽  
Key Factor

Near-infrared (NIR) light induced photothermal cancer therapy using nanomaterials as photothermal agents has attracted considerable research interest over the past few years. As the key factor in the photothermal therapy...

Semi-crystalline carbonaceous structure as a wide-spectrum-responsive photocatalyst for efficient redox catalysis

2021 ◽  
Author(s):  
Pengju Yang ◽  
Ruonan Wang ◽  
Hongxia Zhang ◽  
Jianghong Zhao ◽  
Peng Wang ◽  
...  
Keyword(s):  
Light Harvesting ◽  
Wide Spectrum ◽  
Redox Catalysis ◽  
Nir Light ◽  
Light Region

Herein, we synthesized an oxygen- and nitrogen-containing carbonaceous structure (ONCS). This ONCS possessed exceptional light-harvesting ranging from visible to NIR light region. Characterization results confirmed that the ONCS was a...

Turning waste into wealth: remotely NIR light‐controlled precious metal recovery by covalently functionalized black phosphorus

ChemSusChem ◽  
2021 ◽  
Author(s):  
Siyu Zhang ◽  
Qing Zhao ◽  
Dongsheng Wang ◽  
Shuo Deng ◽  
Dengyu Li ◽  
...  
Keyword(s):  
Precious Metal ◽  
Metal Recovery ◽  
Black Phosphorus ◽  
Nir Light

scholarly journals Near-Infrared-Triggered Upconverting Nanoparticles for Biomedicine Applications

Biomedicines ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 756
Author(s):  
Manoj Kumar Mahata ◽  
Ranjit De ◽  
Kang Taek Lee
Keyword(s):  
Drug Delivery ◽  
Photothermal Therapy ◽  
Near Infrared ◽  
Cutting Edge ◽  
Clinical Translation ◽  
Basic Knowledge ◽  
Nanotechnology Research ◽  
Nir Light

Due to the unique properties of lanthanide-doped upconverting nanoparticles (UCNP) under near-infrared (NIR) light, the last decade has shown a sharp progress in their biomedicine applications. Advances in the techniques for polymer, dye, and bio-molecule conjugation on the surface of the nanoparticles has further expanded their dynamic opportunities for optogenetics, oncotherapy and bioimaging. In this account, considering the primary benefits such as the absence of photobleaching, photoblinking, and autofluorescence of UCNPs not only facilitate the construction of accurate, sensitive and multifunctional nanoprobes, but also improve therapeutic and diagnostic results. We introduce, with the basic knowledge of upconversion, unique properties of UCNPs and the mechanisms involved in photon upconversion and discuss how UCNPs can be implemented in biological practices. In this focused review, we categorize the applications of UCNP-based various strategies into the following domains: neuromodulation, immunotherapy, drug delivery, photodynamic and photothermal therapy, bioimaging and biosensing. Herein, we also discuss the current emerging bioapplications with cutting edge nano-/biointerfacing of UCNPs. Finally, this review provides concluding remarks on future opportunities and challenges on clinical translation of UCNPs-based nanotechnology research.

Biodegradable Nano-photosensitizer with Photoactivatable Singlet Oxygen Generation for Synergistic Phototherapy

2021 ◽  
Author(s):  
Jiaxin Shen ◽  
Dandan Chen ◽  
Ye Liu ◽  
Guoyang Gao ◽  
Zhihe Liu ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Cancer Therapy ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Promising Method ◽  
Normal Cells ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Nir Light

Photodynamic therapy (PDT) is a promising method for cancer therapy and also may initiate unexpected damages to normal cells and tissues. Herein, we developed a near-infrared (NIR) light-activatable nanophotosensitizer, which...

Engineered NIR light-responsive bacteria as anti-tumor agent for targeted and precise cancer therapy

2021 ◽  
pp. 130842
Author(s):  
Huizhuo Pan ◽  
Lianyue Li ◽  
Gaoju Pang ◽  
Chunli Han ◽  
Baona Liu ◽  
...  
Keyword(s):  
Cancer Therapy ◽  
Nir Light ◽  
Tumor Agent

A Metal–Organic Supramolecular Box as a Universal Reservoir of UV, WL, and NIR Light for Long‐Persistent Luminescence

2019 ◽  
Vol 58 (11) ◽  
pp. 3481-3485 ◽  
Author(s):  
Zheng Wang ◽  
Cheng‐Yi Zhu ◽  
Shao‐Yun Yin ◽  
Zhang‐Wen Wei ◽  
Jian‐Hua Zhang ◽  
...  
Keyword(s):  
Persistent Luminescence ◽  
Nir Light ◽  
Metal Organic

Precisely photothermal controlled releasing of antibacterial agent from Bi2S3 hollow microspheres triggered by NIR light for water sterilization

2020 ◽  
Vol 381 ◽  
pp. 122630 ◽  
Author(s):  
Wan-Ni Wang ◽  
Chen-Yang Zhang ◽  
Mao-Feng Zhang ◽  
Pei Pei ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Antibacterial Agent ◽  
Hollow Microspheres ◽  
Nir Light
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