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您的检索式：作者名="Chuwei Liang"
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| 1 | Spatial modulation of nanopattern dimensions by combining interference lithography and grayscale-patterned secondary exposure显示文摘Functional nanostructures are exploited for a variety of cutting-edge fields including plasmonics,metasurfaces,and biosensors,just to name a few.Some applications require nanostructures with uniform feature sizes while others rely on spatially varying morphologies.However,fine manipulation of the feature size over a large area remains a substantial challenge because mainstream approaches to precise nanopatterning are based on low-throughput pixel-by-pixel processing,such as those utilizing focused beams of photons,electrons,or ions.In this work,we provide a solution toward wafer-scale,arbitrary modulation of feature size distribution by introducing a lithographic portfolio combining interference lithography(IL)and grayscale-patterned secondary exposure(SE).Employed after the high-throughput IL,a SE with patterned intensity distribution spatially modulates the dimensions of photoresist nanostructures.Based on this approach,we successfully fabricated 4-inch wafer-scale nanogratings with uniform linewidths of<5%variation,using grayscale-patterned SE to compensate for the linewidth difference caused by the Gaussian distribution of the laser beams in the IL.Besides,we also demonstrated a wafer-scale structural color painting by spatially modulating the filling ratio to achieve gradient grayscale color using SE. | Zhuofei Gan Hongtao Feng Liyang Chen Siyi Min Chuwei Liang Menghong Xu Zijie Jiang Zhao Sun Chuying Sun Dehu Cui Wen-Di Li | 2022 | Light(Science & Applications)2022，11，5： | 3 |
| 2 | Comparison of PM_(2.5) and CO_(2) Concentrations in Large Cities of China during the COVID-19 Lockdown显示文摘Estimating the impacts on PM_(2.5)pollution and CO_(2)emissions by human activities in different urban regions is important for developing efficient policies.In early 2020,China implemented a lockdown policy to contain the spread of COVID-19,resulting in a significant reduction of human activities.This event presents a convenient opportunity to study the impact of human activities in the transportation and industrial sectors on air pollution.Here,we investigate the variations in air quality attributed to the COVID-19 lockdown policy in the megacities of China by combining in-situ environmental and meteorological datasets,the Suomi-NPP/VIIRS and the CO_(2)emissions from the Carbon Monitor project.Our study shows that PM_(2.5)concentrations in the spring of 2020 decreased by 41.87%in the Yangtze River Delta(YRD)and 43.30%in the Pearl River Delta(PRD),respectively,owing to the significant shutdown of traffic and manufacturing industries.However,PM_(2.5)concentrations in the Beijing-Tianjin-Hebei(BTH)region only decreased by 2.01%because the energy and steel industries were not fully paused.In addition,unfavorable weather conditions contributed to further increases in the PM_(2.5)concentration.Furthermore,CO_(2)concentrations were not significantly affected in China during the short-term emission reduction,despite a 19.52%reduction in CO_(2)emissions compared to the same period in 2019.Our results suggest that concerted efforts from different emission sectors and effective long-term emission reduction strategies are necessary to control air pollution and CO_(2)emissions. | Chuwei LIU Zhongwei HUANG Jianping HUANG Chunsheng LIANG Lei DING Xinbo LIAN Xiaoyue LIU Li Zhang Danfeng WANG | 2022 | Advances in Atmospheric Sciences2022，39，6： | 2 |
| 3 | Gradient wettability induced by deterministically patterned nanostructures显示文摘We report a large-scale surface with continuously varying wettability induced by ordered gradient nanostructures.The gradient pattern is generated from nonuniform interference lithography by utilizing the Gaussian-shaped intensity distribution of two coherent laser beams.We also develop a facile fabrication method to directly transfer a photoresist pattern into an ultraviolet(UV)-cured high-strength replication molding material,which eliminates the need for high-cost reactive ion etching and e-beam evaporation during the mold fabrication process.This facile mold is then used for the reproducible production of surfaces with gradient wettability using thermal-nanoimprint lithography(NIL).In addition,the wetting behavior of water droplets on the surface with the gradient nanostructures and therefore gradient wettability is investigated.A hybrid wetting model is proposed and theoretically captures the contact angle measurement results,shedding light on the wetting behavior of a liquid on structures patterned at the nanoscale. | Siyi Min Shijie Li Zhouyang Zhu Wei Li Xin Tang Chuwei Liang Liqiu Wang Xing Cheng Wen-Di Li | 2020 | Microsystems & Nanoengineering2020，6，1： | 1 |
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