Surface-enhanced Raman scattering (SERS) sensors are constructed from metallic plasmonic nanostructures providing high sensitivity and spectral reproducibility. In many cases, irradiation of the SERS substrate by the laser beam leads to an increase of the local temperature and consequently to thermal degradation of metallic nanostructure itself and/or adsorbed analyte. We report here a "bottom-up" technique to fabricate new thermally resistant gold "film over nanosphere" (FON) substrates for SERS. We elaborated the simple and straightforward method of preparation of homogeneously and closely packed monolayer of SiO nanoparticles (50 nm in diameter) and covered it by a thin (20 nm) layer of magnetron-sputtered gold. The spectral testing using biologically important molecules (methylene blue, cationic porphyrin, and fungicide 1-methyl-1H-benzimidazole-2-thiol) proved a sensitivity and reproducibility of our AuSiO substrates. The main advantage of such SERS-active substrates is high thermal stability and low intensity of background and signal of graphitic carbon.
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http://dx.doi.org/10.3390/nano9101426 | DOI Listing |
Med J Islam Repub Iran
September 2024
Iranian Center of Excellence in Physiotherapy, Rehabilitation Research Center, Department of Physiotherapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Background: This study was designed to compare the effectiveness of manual therapy alone and a combination of it and TECAR (Transfer Energy Capacitive and Resistive) therapies on the conditions of pain, disability, and neck range of motion (ROM) in patients with non-specific chronic neck pain (NCNP).
Methods: In this Randomized controlled study, 30 women with non-specific chronic neck pain were randomly divided into two groups: Manual therapy along with TECAR therapy (intervention group) and single manual therapy (control group). The participants were homogenized in terms of age, height, and weight.
Cytotechnology
February 2025
Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Mechanical and thermal cell damage can occur due to invasive procedures related to drilling, the insertion of dental implants, and periodontal treatments. Necrotic cells release the content of their cytoplasm and membrane fragments, thereby signaling the need for repair, which includes bone resorption by osteoclasts and inflammation. Here we screened lysates from human gingival fibroblasts, HSC2 and TR146 oral squamous carcinoma cell lines, as well as murine IDG-SW3 osteocytic and RAW264.
View Article and Find Full Text PDFSmall
January 2025
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Polymer composite materials encounter considerable challenges in sustaining superior tribological properties at high rotational speeds. Inspired by the microstructure of dragonfly wings, a novel thermally stable and ambient pressure curing poly(urea-imide) resin (PURI) with excellent tribological properties has been eco-friendly synthesis using bio-based greener solvents. Furthermore, The PURI composites enhanced with polyether ether ketone (PEEK) and Polytetrafluoroethylene (PTFE) blended fabrics demonstrate excellent mechanical, with tensile strengths exceeding 175 MPa.
View Article and Find Full Text PDFAdv Mater
January 2025
Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
The development of narrowband emissive, bright, and stable solution-processed organic light-emitting diodes (SP-OLEDs) remains a challenge. Here, a strategy is presented that merges within a single emitter a TADF sensitizer responsible for exciton harvesting and an MR-TADF motif that provides bright and narrowband emission. This emitter design also shows strong resistance to aggregate formation and aggregation-cause quenching.
View Article and Find Full Text PDFSci Rep
January 2025
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, 114051, China.
In order to provide long-term anti-corrosion properties of the coatings on the substrate, a microcapsule self-healing coatings system was designed in this paper. Microcapsules were synthesized with ethyl cellulose and octadecyl amine, which were added to epoxy resin to prepare self-healing coatings. The shape of microcapsules was spherical, the average particle size of microcapsules was about 100-120 μm, and the average thickness of microcapsules was 4.
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