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Activating SERS Signals of Inactive Analytes: Creating an Energy Bridge between Metal/Molecule Energy Alignment via Metal/Semiconductor Transitions.
Anal Chem
January 2025
Phenikaa University Nano Institute (PHENA), Phenikaa University, Hanoi 12116, Vietnam.
Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical technique, yet it faces challenges with certain probe molecules exhibiting weak or inactive signals, limiting their applicability. In a recent study, we investigated this phenomenon using a set of four probe molecules─chloramphenicol (CAP), 4-nitrophenol (4-NP), amoxicillin (AMX), and furazolidone (FZD)─deposited on Ag-based nanostructured SERS substrates. Despite being measured under identical conditions, CAP and 4-NP exhibited SERS activity, while AMX and FZD did not.
View Article and Find Full Text PDFThe rapid development of GaAs photocathodes has led to an increased focus on the attainment of high quantum efficiency. Three types of exponential-doping structures with a high to low doping concentration distribution from the interior to the surface are proposed for reflective GaAs emission layers. These three structures generate different built-in electric fields that facilitate photoelectron emission.
View Article and Find Full Text PDFFactors influencing blood donation among university students in Vojvodina, Serbia: cross-sectional study.
BMJ Open
November 2024
Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.
Background And Objectives: The aim of the present study was to assess the effect of sociodemographic factors on knowledge, attitudes, motivation and potential barriers of university students towards blood donation in the order to more effective donation promotion.
Design: The cross-sectional study was conducted on 1000 participants (500 non-blood donors-NBD, 276 first time blood donors-FTBD and 224 regular blood donors-RBD) from the 14 faculties of the University of Novi Sad, Serbia. The measurement tool used was a pretested survey questionnaire that included 22 questions focused on the factors influencing blood donation.
Impact of nuclear deformation of parent and daughter nuclei on one proton radioactivity lifetimes.
Sci Rep
November 2024
Department of Physics, University of Mumbai, Vidhyanagari, Mumbai, 400098, Maharashtra, India.
Article Synopsis
- A systematic study has been conducted on how nuclear deformation affects the half-lives of proton decay in nuclei with atomic number Z<82, examining the relationship between 1p-decay half-lives and the shapes of both parent and daughter nuclei.
- The research incorporates the nuclear deformations of the emitters and residues to create a new semi-empirical formula that accurately estimates 1p-decay half-lives, reliably predicting measured values and aiding in forecasting other potential proton emitters.
- The phenomenon of shape coexistence in proton emitters and their daughter nuclei introduces additional factors affecting half-life estimations, as it creates secondary minima in potential energy surfaces and adds new decay pathways
Interfacial Metal Chlorides as a Tool to Enhance Charge Carrier Dynamics, Electroluminescence, and Overall Efficiency of Organic Optoelectronic Devices.
ACS Appl Mater Interfaces
November 2024
Hasselt University, Institute for Materials Research (imo-imomec), Martelarenlaan 42, B-3500 Hasselt, Belgium.
Interface engineering is the key to optimizing optoelectronic device performance, addressing challenges like reducing potential barriers, passivating interface traps, and controlling recombination of charges. Metal fluorides such as lithium fluoride are employed in interface modification within organic devices due to their strong dipole characteristics but carry health risks, high processing costs, and minimal impact on interface traps in organic electronics. Hence, this study investigates alternative metal chloride (MC) nanocrystals (sodium, cesium, rubidium, and potassium chlorides) that exhibit a strong dipole moment and are readily processable with the aim of reducing the influence of interface traps.
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