This feature issue highlights the latest developments in laser-based sensing and free space communications. In total, 15 papers were published in Applied Optics, including an invited review paper that celebrates the legacy of David L. Fried.
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| http://dx.doi.org/10.1364/AO.502356 | DOI Listing |
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Hydrogen-Bonded Organic Framework Nanosheets with Rich Free Oxygen Atoms for NO Sensing.
Inorg Chem
January 2025
School of Materials Science and Engineering, Hainan University, Haikou 570228, China.
Hydrogen-bonded organic frameworks (HOFs) are under fast development in broad applications but have not been well explored for chemiresistive gas sensing yet primarily due to insufficient active sites. Herein, a new porphyrin-based HOF-199 is constructed by OH···O hydrogen bonds featuring layered networks and rich free oxygen (O) atoms, which is further exfoliated into few-layer nonosheets with more dangling O sites through an ultrasound-assisted liquid exfoliation method (namely L-HOF-199). Benefiting from rich electron-donor sites, L-HOF-199 demonstrates exceptional NO sensing properties under ambient conditions, achieving a remarkable 3.
View Article and Find Full Text PDFStacking paper sheets into multi-purpose quick response sensing code with built-in nitrocellulose-membrane-free lateral flow assay for detecting tetracycline in food samples.
Food Chem
January 2025
State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China. Electronic address:
Lateral flow assays (LFAs) have found extensive applications in food safety and quality monitoring. Now, smartphone technology is redefining how tests are conducted at the point of use. At the same time, quick response (QR) codes enhance digital connectivity for information transmission, data collection, and response linkage.
View Article and Find Full Text PDFA cell-free biosensor signal amplification circuit with polymerase strand recycling.
Nat Chem Biol
January 2025
Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, USA.
Cell-free systems are powerful synthetic biology technologies that can recapitulate gene expression and sensing without the complications of living cells. Cell-free systems can perform more advanced functions when genetic circuits are incorporated. Here we expand cell-free biosensing by engineering a highly specific isothermal amplification circuit called polymerase strand recycling (PSR), which leverages T7 RNA polymerase off-target transcription to recycle nucleic acid inputs within DNA strand displacement circuits.
View Article and Find Full Text PDFChemical signatures of social information in Barbary macaques.
Sci Rep
January 2025
Behavioural Ecology Group, Institute of Biology, Leipzig University, Talstraße 33, 04103, Leipzig, Germany.
Primates are well-known for their complex social lives and intricate social relationships, which requires them to obtain and update social knowledge about conspecifics. The sense of smell may provide access to social information that is unavailable in other sensory domains or enhance the precision and reliability of other sensory cues. However, the cognition of social information in catarrhine primates has been studied primarily in the visual and auditory domain.
View Article and Find Full Text PDFAptamer proximal enzyme cascade reactions for ultrafast detection of glucose in human blood serum.
Mikrochim Acta
January 2025
College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
An innovative colorimetric sensing strategy was developed for the detection of glucose by the integration of glucose aptamer, glucose oxidase (GOx), and horseradish peroxidase (HRP), termed aptamer proximal enzyme cascade reactions (APECR). In the presence of glucose, aptamer binding enables GOx to catalyze glucose oxidation into HO efficiently. Subsequently, the adjacent HRP catalyzes the oxidation of the peroxidase substrate, 2,2'-biazobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), utilizing the generated HO, resulting in a distinct color change.
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