A5039225810- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Advanced Fiber Optic Sensors
- Vehicle emissions and performance
- Optical Network Technologies
- Atmospheric Ozone and Climate
- Photonic Crystal and Fiber Optics
- Forest, Soil, and Plant Ecology in China
- Photonic and Optical Devices
- Plant Ecology and Soil Science
- Environmental and Agricultural Sciences
- Advanced Fiber Laser Technologies
- Catalytic Processes in Materials Science
- Atmospheric aerosols and clouds
- Smart Materials for Construction
- Indoor Air Quality and Microbial Exposure
- Phase-change materials and chalcogenides
- Hydrocarbon exploration and reservoir analysis
- Advanced Power Generation Technologies
- Hydraulic Fracturing and Reservoir Analysis
- Catalysis and Oxidation Reactions
- Advanced Measurement and Detection Methods
- Infection Control and Ventilation
- Micro and Nano Robotics
Institute of Earth Environment
2019-2024
Chinese Academy of Sciences
2017-2024
Qingdao University
2023
Shenyang Institute of Automation
2017-2022
Hong Kong Polytechnic University
2014-2022
Nanjing University of Information Science and Technology
2022
Education University of Hong Kong
2022
Czech Academy of Sciences, Institute of Atmospheric Physics
2022
Sejong University
2022
Shandong Center for Disease Control and Prevention
2021
A switchable perfect absorber with multispectral thermal imaging capability is presented. Aluminum nanoantenna arrays above a germanium antimony telluride (GST) spacer layer and aluminum mirror provide efficient wavelength-tunable absorption in the mid-infrared. Utilizing amorphous-to-crystalline phase transition GST, this device offers strong reflectance contrast at resonance large phase-change-induced spectral shifts.
We will discuss fabrication of twin core photonic crystal fiber (TC-PCF) using the stack-and-draw method and its application for in-line Mach-Zehnder interferometers. The small difference in effective indexes two modes leads to interference fringes birefringence cores results polarization-dependent fringe spacing. strain sensitivity was negative wavelength-dependent. A novel intensity-based bend sensor is also demonstrated with bend-induced spatial shift. High air filling fraction fabricated...
Nitrous acid (HONO) is an important precursor of OH radicals in the atmosphere. In urban areas, emissions from vehicles are main source air pollutants, including reactive nitrogen. Previously reported emission ratios HONO (HONO/NOx) were measured late 1990s and need to be updated due significant changes control technologies. We ratio a fleet (38% diesel on average) March 11 21, 2015, road tunnel Hong Kong. The 1.24% (±0.35%) obtained greater than commonly adopted 0.8% or 0.3%. elevated found...
Abstract. Volatile organic compound (VOC) control is an important issue of air quality management in Hong Kong because ozone formation generally VOC limited. Several oxygenated volatile (OVOC) and measurement techniques – namely, (1) offline 2,4-dinitrophenylhydrazine (DNPH) cartridge sampling followed by high-performance liquid chromatography (HPLC) analysis; (2) online gas (GC) with flame ionization detection (FID); (3) canister GC mass spectrometer (MSD), FID, electron capture (ECD) were...
This study characterized motor vehicle emission rates and compositions in Hong Kong's Shing Mun tunnel (SMT) during 2015 compared them to similar measurements from the same 2003. Average PM2.5 concentrations SMT decreased by ∼70% 229.1 ± 22.1 µg/m3 2003 74.2 2.1 2015. Both sulfur dioxide (SO2) factors (EFD) were reduced ∼80% total non-methane (NMHC) hydrocarbons EFD 44%. These reductions are consistent with long-term trends of roadside ambient inventory estimates, indicating effectiveness...
Abstract. To investigate impact factors and source area of secondary organic aerosols in the Yangtze River Delta (YRD) region, a world-class urban agglomeration China, long-term measurements carbon (OC) elementary (EC) particulate matter less than 2.5 µm (PM2.5) with hourly time resolution were conducted at regional site Shanghai from 2016 to 2020. Based on 5-year measurements, interannual, monthly, seasonal, diurnal variations OC EC, as well subtypes, i.e. (SOC) primary (POC), apportioned...
A new insight into the room-temperature catalytic degradation of indoor formaldehyde and its practical implications over TiO<sub>2</sub>-supported MnO<sub>x</sub>–CeO<sub>2</sub> were investigated.