A5042591344- Advancements in Photolithography Techniques
- Electron and X-Ray Spectroscopy Techniques
- Copper Interconnects and Reliability
- Semiconductor materials and devices
- Material Dynamics and Properties
- Surface Roughness and Optical Measurements
- Nanofabrication and Lithography Techniques
- Polymer crystallization and properties
- Metal and Thin Film Mechanics
- Block Copolymer Self-Assembly
- Optical Coatings and Gratings
- Nuclear Physics and Applications
- X-ray Diffraction in Crystallography
- Integrated Circuits and Semiconductor Failure Analysis
- Polymer Nanocomposites and Properties
- Force Microscopy Techniques and Applications
- Advanced Surface Polishing Techniques
- Advanced biosensing and bioanalysis techniques
- Molecular Sensors and Ion Detection
- Biosensors and Analytical Detection
- Hydrogels: synthesis, properties, applications
- Material Properties and Processing
- Phase Equilibria and Thermodynamics
- Muon and positron interactions and applications
- Analytical Chemistry and Sensors
Qilu University of Technology
2020-2025
Chinese Academy of Forestry
2024-2025
Shandong Academy of Sciences
2020-2025
Research Institute of Forestry
2024-2025
Jining Medical University
2025
Seattle University
2024
Jiangsu Normal University
2024
University of Washington
2011-2024
South China Normal University
2024
Yan'an University
2024
The glass transition temperatures (Tg's) of ultrathin films (thickness 80−18 nm) polystyrene (PS) and poly(methyl methacrylate) (PMMA) were measured on surfaces with interfacial energies (γSL) ranging from 0.50 to 6.48 mJ/m2. consisted self-assembled octadecyltrichlorosilane (OTS) that exposed X-rays in the presence air. Exposure X-ray radiation systematically modified OTS by incorporating oxygen-containing groups surface. energy for PS PMMA surface was quantified as a function dose using...
The thermal behavior of ultrathin films poly-(2)-vinylpyridine spin-cast on acid-cleaned silicon oxide substrates is considered. interaction between the polymer and substrate polar in nature very favorable. As a means examining properties films, x-ray reflectivity used to measure temperature dependence film thickness. This experimentally measured thickness-temperature data determine transition temperatures expansivities. Significantly increased (20-50 \ifmmode^\circ\else\textdegree\fi{}C...
The thermal expansion of polystyrene thin films, supported on hydrogen-terminated silicon substrates, is measured by x-ray reflectivity. Films the order 400 \AA{} and thinner show no glass transition up to at least 60 \ifmmode^\circ\else\textdegree\fi{}C above bulk glass-transition temperature, while a break in thickness versus temperature curve, signaling onset behavior, observed for thicker films. This increase contrast similar studies native-oxide surface where decrease observed....
Abstract Plasmon stimulation represents an appealing way to modulate enzyme mimic functions, but utilization efficiency of plasmon excitation remains relatively low. To overcome this drawback, a heterojunction composite based on graphdiyne nanowalls wrapped hollow copper sulfide nanocubes (CuS@GDY) with strong localized surface resonance (LSPR) response in the near‐infrared (NIR) region is developed. This nanozyme can concurrently harvest LSPR induced hot carriers and produce photothermal...
The wear resistance of a commercial dental restorative composite exposed to different chemicals was measured with pin-disc apparatus. initial rate increased dramatically once the had been immersed in known soften cross-linked matrix material, which is copolymer derived from BIS-GMA and diluent monomer. increase chemically softened found persist over depth beyond 160 μm for specimens two wk prior testing.
The frequency and energy dissipation change of a quartz crystal microbalance during moisture absorption was measured for films with thickness ranging from 3 to 205 nm. Evidence the viscoelastic nature observed thicker than 90 nm through changes. For sufficiently thin (t < 40 nm), could be effectively modeled as simple increase in mass, predicted by Sauerbrey equation. viscosity swollen independent initial polymer film (93−205 nm). equilibrium swelling ratio all examined (3−205 transition...
The temperature dependent thicknesses of ultrathin polystyrene films under vacuum on Si (111) substrates were investigated via x-ray reflectivity in situ. contraction polymer was directly observed for the first time to author's knowledge. degree depends initial thickness film, with magnitude increasing decreasing film thickness. This ranged from 0--17 % and occurred at temperatures well below reported bulk glass transition temperature.
Cooperation between organelles is essential to maintain the normal functions of cells. Lipid droplets (LDs) and nucleoli, as important organelles, play an role in activities However, due lack appropriate tools, situ observation interaction them has been rarely reported. In this work, taking into full consideration pH charge differences LDs a pH-triggered reversible fluorescent probe (LD-Nu) was constructed based on cyclization-ring-opening mechanism. The vitro titration experiment 1H NMR...
Neutron reflectometry is used to measure polymer mobility over distances less than 200 Å as a function of distance from an attractive solid surface and molecular size. Effective diffusion coefficients, Deff, are determined the rates interdiffusion between supported bilayers deuterated hydrogenated poly(methyl methacrylate) (PMMA). The thickness d-PMMA layer varied radius gyration, Rg, bulk 11Rg for three weight pairs polymers. Deff dramatically decreases in samples with layers 3Rg thick...
A new methodology based on a novel combination of high-resolution specular x-ray reflectivity and small-angle neutron scattering has been developed to evaluate the structural properties low-dielectric-constant porous silica thin films about one micrometer thick supported silicon wafer substrates. To complement these results, film composition was determined by high-energy ion techniques. For example presented here, overall density found be (0.55±0.01) g/cm3 with pore wall (1.16±0.05) porosity...
The acquisition of radioresistance by esophageal squamous carcinoma (ESC) cells during radiotherapy may lead to cancer recurrence and poor survival. Previous studies have demonstrated that ionizing radiation (IR) induces epithelial-mesenchymal transition (EMT) ESC accompanied increased migration, invasion, radioresistance. However, the underlying molecular mechanisms IR-induced EMT are not well established, hampering development potential solutions. To address this issue, we investigated...
Bisulfite plays crucial roles in diverse physiological processes. Therefore, the efficient detection of bisulfite is very important. In this study, we report a colorimetric and ratiometric fluorescent probe (CPT) with large Stokes shift (162 nm) for (HSO3(-)) based FRET mechanism. The can quantitatively detect HSO3(-) low limit (45 nM) high specificity over other common anions biothiols. A nucleophilic addition reaction was proposed sensing mechanism, which confirmed by HRMS spectra. test...
Dental pulp stem cells (DPSCs) were widely used as seed in the field of tissue engineering and regenerative medicine, including spinal cord injury (SCI) repair other neuronal degenerative diseases, due to their easy isolation, multiple differentiation potential, low immunogenicity rates rejection during transplantation. Various studies have shown that bFGF can enhance peripheral nerve regeneration after injury, phospho-ERK (p-ERK) activation a major mediator may be involved this process....
Neutron reflectometry is used to study interdiffusion in bilayers of hydrogenated and deuterated poly(methyl methacrylate) (PMMA) on silicon substrates where the polymer−substrate interaction energy strongly attractive. The effect rate as a function distance from surface investigated. Samples are prepared with lower layer thicknesses PMMA ranging 35 335 Å or 0.4 3.6 radii gyration (Rg) bulk polymer chain. found be dependent upon film size. Polymers films less than Rg thickness have effective...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFilm Thickness Dependent Thermal Expansion in Ultrathin Poly(methyl methacrylate) Films on SiliconWen-li Wu, John H. van Zanten, and William J. OrtsCite this: Macromolecules 1995, 28, 3, 771–774Publication Date (Print):January 1, 1995Publication History Published online1 May 2002Published inissue 1 January 1995https://pubs.acs.org/doi/10.1021/ma00107a013https://doi.org/10.1021/ma00107a013research-articleACS PublicationsRequest reuse...
Double-network hydrogels (DN-gels) prepared from the combination of a moderately cross-linked anionic polyelectrolyte (PE) and an uncross-linked linear polymer solution (NP) exhibit mechanical properties such as fracture toughness that are intriguingly superior to their individual constituents. The scheme double-network preparation, however, is not equally successful for all polyelectrolyte/neutral pairs. A example poly(2-acrylamido-2-methyl-1-propane sulfonic acid) (PAMPS) network...