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Optical Phonon Decay and Improved Thermoelectric Efficiency in p-Type MgSb.
ACS Appl Mater Interfaces
January 2025
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), IIT M Research Park, Chennai 600113, India.
The MgSb-based layered compounds exhibit exceptional thermoelectric properties over a wide temperature range and possess the potential to supplant traditional BiTe modules with reliable and economical MgSb-based thermoelectric devices, contingent upon the availability of a complementary p-type MgSb material with high thermoelectric efficiency comparable to that of n-type MgSb. We provide a simpler method involving the codoping of monovalent atoms (K and Na) at the Mg site of the MgSb lattice to improve the thermoelectric performance of p-type MgSb. K-Na codoping results in a peak power factor of around 0.
View Article and Find Full Text PDFBio-Conjugated Carbon Quantum Dots for Intracellular Uptake and Bioimaging Applications.
J Fluoresc
January 2025
Department of Medical Biotechnology and Stem Cell and Regenerative Medicine, Centre for Interdisciplinary Research, D. Y. Patil Education Society (Deemed to be University), Kolhapur, Maharashtra, 416 006, India.
Carbon quantum dots (CQDs) demonstrate outstanding biocompatibility and optical properties, making them ideal for monitoring cellular uptake. Due to their ultra-small size (typically < 10 nm) and fluorescent nature, CQDs hold significant potential as nanoparticles for bioimaging and tracking intracellular processes. The study examined the optimization parameters for conjugating calf thymus DNA (Ct-DNA) to CQDs to facilitate Ct-DNA internalization in mouse fibroblast cells (L929) and human breast cancer cells (MCF-7).
View Article and Find Full Text PDFPreparation of Carbon Dots with High Fluorescence Quantum Yields and its Detection of Hg in Simulated Wastewater.
J Fluoresc
January 2025
College of Biological and Chemical Engineering, Qilu Institute of Technology, Jinan, 250200, P.R. China.
Fluorescent carbon quantum dots (CDs) have received widespread attention for their potential applications in optical sensing. Meanwhile, as the importance of mercury ion (Hg) detection in the environment, the exploration of Hg fluorescent nanosensor based on CDs with high quantum yield is particularly intriguing. Herein, nitrogen-doped carbon quantum dots (N-CDs) were prepared by microwave method using citric acid as carbon source and urea as nitrogen source, and glycerol as microwave solvent.
View Article and Find Full Text PDFBiomarkers.
Alzheimers Dement
December 2024
Ophthalmology, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea, Republic of (South).
Background: Spectrum Domain-Optical Coherence Tomography (SD-OCT) is a non-invasive technology that acquires cross-sectional images of retinal structures allowing neural fundus integrity assessment. Macular thickness and retinal nerve fiber layer (RNFL) thickness measured by an SD-OCT have been used as a indicator of Alzheimer's disease (AD) and amnestic mild cognitive impairment (aMCI). However which portion of retinal RNFL is the most sensitive area among normal control, aMCI and AD is not clear yet.
View Article and Find Full Text PDFBackground: Hemodynamic signals are the basis of functional brain imaging techniques, such as fMRI and NIRS, and are often used to infer changes in resting-state functional connectivity (RSFC) in Alzheimer's disease (AD) and other dementias. Increasing evidence suggests that disruption of neuronal circuits has been associated with the AD continuum and may precede changes in Ab and tau biomarkers, neurodegeneration, and cognitive impairment. To better understand the changes in brain RSFC through the AD spectrum, we use hemodynamic signals to detect disease onset, progression, and response to therapy in a mouse model of AD.
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