A5090104873- Copper Interconnects and Reliability
- Muon and positron interactions and applications
- Semiconductor materials and devices
- Transition Metal Oxide Nanomaterials
- Optical Coatings and Gratings
- Advancements in Battery Materials
- Optical Polarization and Ellipsometry
- Hydrology and Drought Analysis
- Silicone and Siloxane Chemistry
- Surface Modification and Superhydrophobicity
- Mesoporous Materials and Catalysis
- Climate variability and models
- Environmental Changes in China
- Ammonia Synthesis and Nitrogen Reduction
- Semiconductor materials and interfaces
- Photonic Crystals and Applications
- Photoacoustic and Ultrasonic Imaging
- Per- and polyfluoroalkyl substances research
- Molecular Junctions and Nanostructures
- Sparse and Compressive Sensing Techniques
- Analytical chemistry methods development
- Carbon Dioxide Capture Technologies
- Solid State Laser Technologies
- Gas Sensing Nanomaterials and Sensors
- Advanced Fiber Laser Technologies
Beijing Forestry University
2024
Northeast Normal University
2022-2024
Hebei University of Technology
2023-2024
Shandong University of Science and Technology
2024
Shanghai Jiao Tong University
2024
Minzu University of China
2024
Hua Yuan Group (China)
2024
Shenyang Pharmaceutical University
2023
J.A. Woollam Company (United States)
2009-2022
Shaanxi Normal University
2021-2022
An existing model that relates the annihilation lifetime of positronium trapped in subnanometer pores to average size is extended account for any pore and at temperature. This extension enables use spectroscopy characterizing nanoporous mesoporous materials, particular thin insulating films where introduction porosity crucial achieving a low dielectric constant, K. Detailed results calculations are presented along with extensive experimental systematically check vs calibration variety low-K...
Well-ordered mesoporous silicate films were prepared by infusion and selective condensation of silicon alkoxides within microphase-separated block copolymer templates dilated with supercritical carbon dioxide. Confinement metal oxide deposition to specific subdomains the preorganized template yields high-fidelity, three-dimensional replication morphology, enabling preparation structures multiscale order in a process that closely resembles biomineralization. Ordered synthesized dielectric...
The intriguing physics of vanadium dioxide (VO2) makes it not only a fascinating object study for fundamental research on solid-state but also an attractive means to actively modify the properties integrated devices. In particular, exceptionally large complex refractive index variation produced by insulator-to-metal transition this material opens up interesting opportunities dynamically tune optical systems. This Perspective reviews some exciting work done VO2 nanophotonics in last decade...
Scene recovery is a fundamental imaging task with several practical applications, including video surveillance and autonomous vehicles, etc. In this article, we provide new real-time scene framework to restore degraded images under different weather/imaging conditions, such as underwater, sand dust haze. A image can actually be seen superimposition of clear the same color environment (underwater, or haze, etc.). Mathematically, introduce rank-one matrix characterize phenomenon, i.e., prior...
Triblock polymers, poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (PEO-b-PPO-b-PEO), are used as molecular templates in poly(methyl silsesquioxane) (MSQ) matrixes to fabricate nanoporous organosilicates for low dielectric constant applications. The results show that aggregation of block copolymers the MSQ matrix can be prevented with fast solvent evaporation which accompanies spin casting. Solid-state NMR shows triblock copolymer microphase-separates from during a curing step,...
A schematic illustration of ZIF-90 nanocomposites applied to anticancer therapy, biomedical imaging and other fields for the treatment different diseases.
Triblock polymers, poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (PEO-b-PPO-b-PEO), are used as molecular templates in poly(methyl silsesquioxane) (MSQ) matrixes to fabricate nanoporous organosilicates. The triblock copolymers microphase-separate into nanometer domains the MSQ matrix becomes increasingly hydrophobic during a curing step. Extremely small pores (2−5 nm) generated after thermally removing template material. These materials attain ultralow dielectric constants (k ≈...
Although surfaces more wettable to water than oil are highly desirable in many important applications, such have been rarely reported and the underlying mechanisms remain unclear. Here we report our recent experimental results indicating that peculiar wetting behavior is kinetic nature from combination of nanoscale interfacial phenomena.
Abstract Vanadium dioxide (VO 2 ) is a well‐studied Mott‐insulator because of the very abrupt physical property switching during its semiconductor‐to‐metal transition (SMT) around 341 K (68 °C). In this work, through novel oxide‐metal nanocomposite designs (i.e., Au:VO and Pt:VO ), broad range SMT temperature tuning from ≈ 323.5 to 366.7 has been achieved by varying metallic secondary phase in nanocomposites thin films, respectively). More surprisingly, T c can be further lowered 301.8 (near...
Abstract Key challenges limiting the adoption of metallic plasmonic nanostructures for practical devices include structural stability and ease large‐scale fabrication. Overcoming these issues may require novel metamaterial fabrication with potentials improved durability under extreme conditions. Here, a self‐assembled growth hybrid in thin‐film form is reported, epitaxial Ag nanopillars embedded TiN, mechanically strong chemically inert matrix. One key achievements lies successful control...
The level of difficulty mathematical test items is a critical aspect for evaluating quality and educational outcomes. Accurately predicting item during creation thus significantly important producing effective papers. This study used more than ten years content score data from China’s Henan Provincial College Entrance Examination in Mathematics as an evaluation criterion difficulty, all were obtained the Department Education. Based on framework established by National Center Education...
Abstract Porous thin films containing very small closed pores (∼ 20 Å) with a low dielectric constant 2.0) and excellent mechanical properties have been prepared using the mixture of cyclic silsesquioxane (CSSQ) new porogen, heptakis(2,3,6‐tri‐ O ‐methyl)‐β‐cyclodextrin (tCD). The pore sizes vary from 16.3 Å to 22.2 when content tCD in coating increases 45 wt.‐% according positronium annihilation lifetime spectroscopy (PALS) analysis. It has also found that percolation threshold (the onset...
The pore size and structure in pure silica zeolite MFI in-situ spin-on low dielectric constant (low-k) films were characterized by positronium annihilation lifetime spectroscopy (PALS). For the micropores films, obtained from on-wafer PALS method is 0.55 ± 0.03 nm, this excellent agreement with known crystallographically determined zeolitic (0.55 nm). To our knowledge first comparison of a thin film measurement defined size. mesopores film, results show that they are open/interconnected give...
Tissue diagnosis is important during surgical excision of solid tumors for margin evaluation. Conventional histopathologic methods rely heavily on image-based visual by specialized pathologists, which can be time-consuming and subjective. We report a three-dimensional (3D) histological electrophoresis system rapid labeling separation the proteins within tissue sections, providing more precise assessment tumor-positive in surgically resected tissues. The 3D uses tumor-seeking dye strategy to...
At the nanoscale and interfaces, relaxation behavior of polymer melts, which affects polymer's long-term performance in many important applications, is very different from that bulk. The role polymer-substrate interfacial interaction, does not have a bulk counterpart, has been fully understood to date. In this study, nanometer-thick perfluoropolyether melts on silicon wafer investigated by water contact angle measurement. interactions systematically changed tailoring structure clarify effect...