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| 1 | Remarkably enhanced piezo-photocatalytic performance in BaTiO_(3)/CuO heterostructures for organic pollutant degradation显示文摘Introducing polarization field of piezoelectric materials is an effective strategy to improve photocatalytic performance.In this study,a new type of BaTiO_(3)/CuO heterostructure catalyst was designed and synthesized to achieve high piezo-photocatalytic activity through the synergy of heterojunction and piezoelectric effect.The BaTiO_(3)/CuO heterostructure shows a significantly enhanced piezo-photocatalytic degradation efficiency of organic pollutants compared with the individual BaTiO_(3) nanowires(NWs)and CuO nanoparticles(NPs).Under the co-excitation of ultrasonic vibration and ultraviolet radiation,the optimal degradation reaction rate constant k of polarized BaTiO_(3)/CuO heterostructure on methyl orange(MO)dye can reach 0.05 min^(−1),which is 6.1 times of photocatalytic rate and 7 times of piezocatalytic rate.The BaTiO_(3)/CuO heterostructure with remarkable piezo-photocatalytic behavior provides a promising strategy for the development of high-efficiency catalysts for wastewater purification,and it also helps understand the coupling mechanism between piezoelectric effect and photocatalysis. | Chenye YU Mengxi TAN Chengdong TAO Yuxuan HU Chuanbao LIU Huimin MENG Yanjing SU Lijie QIAO Yang BAI | 2022 | Journal of Advanced Ceramics2022，11，3： | 1 |
| 2 | Orthogonally polarized RF optical single sideband generation with integrated ring resonators显示文摘We review recent work on narrowband orthogonally polarized optical RF single sideband generators as well as dualchannel equalization,both based on high-Q integrated ring resonators.The devices operate in the optical telecommunications C-band and enable RF operation over a range of either fixed or thermally tuneable frequencies.They operate via TE/TM mode birefringence in the resonator.We achieve a very large dynamic tuning range of over 55 dB for both the optical carrier-to-sideband ratio and the dual-channel RF equalization for both the fixed and tunable devices. | Mengxi Tan Xingyuan Xu Jiayang Wu Thach G.Nguyen Sai T.Chu Brent E.Little Arnan Mitchell Roberto Morandotti David J.Moss | 2021 | Journal of Semiconductors2021，42，4： | 1 |
| 3 | Photonic radio frequency channelizers based on Kerr optical micro-combs显示文摘We review recent work on broadband RF channelizers based on integrated optical frequency Kerr micro-combs combined with passive micro-ring resonator filters,with microcombs having channel spacings of 200 and 49 GHz.This approach to realizing RF channelizers offers reduced complexity,size,and potential cost for a wide range of applications to microwave signal detection. | Mengxi Tan Xingyuan Xu Jiayang Wu Thach G.Nguyen Sai T.Chu Brent E.Little Roberto Morandotti Arnan Mitchell David J.Moss | 2021 | Journal of Semiconductors2021，42，4： | 0 |
| 4 | A nanonewton-scale biomimetic mechanosensor显示文摘Biomimetic mechanosensors have profound implications for various areas,including health care,prosthetics,human‒machine interfaces,and robotics.As one of the most important parameters,the sensitivity of mechanosensors is intrinsically determined by the detection resolution to mechanical force.In this manuscript,we expand the force detection resolution of current biomimetic mechanosensors from the micronewton to nanonewton scale.We develop a nanocrack-based electronic whisker-type mechanosensor that has a detection resolution of 72.2 nN.We achieve the perception of subtle mechanical stimuli,such as tiny objects and airflow,and the recognition of surface morphology down to a 30 nm height,which is the finest resolution ever reported in biomimetic mechanosensors.More importantly,we explore the use of this mechanosensor in wearable devices for sensing gravity field orientation with respect to the body,which has not been previously achieved by these types of sensors.We develop a wearable smart system for sensing the body’s posture and movements,which can be used for remote monitoring of falls in elderly people.In summary,the proposed device offers great advantages for not only improving sensing ability but also expanding functions and thus can be used in many fields not currently served by mechanosensors. | Chi Zhang Mengxi Wu Ming Li Lixuan Che Zhiguang Tan Di Guo Zhan Kang Shuye Cao Siqi Zhang Yu Sui Jining Sun Liding Wang Junshan Liu | 2023 | Microsystems & Nanoengineering2023，9，4： | 0 |
| 5 | Ultrasound-assisted extraction of bound phenolic compounds from the residue of Apocynum venetum tea and their antioxidant activities显示文摘Bound phenolic compounds from the residue of Apocynum venetum(A.venetum)tea were released by alkaline digestion with sonication,followed by extraction using ethyl acetate(EtOAc).The fragment ions of compounds in free and bound forms were identified by liquid chromatography electrospray ionization tandem mass spectrometry(LC-ESI-MS/MS)in both positive and negative modes.Further investigation of chemical constituents in the EtOAc extract led to the isolation of eleven individual compounds,and their chemical structures were identified as(−)-epicatechin(1),(−)-loliolide(2),(−)-syringaresinol-4-O-β-D-glucopyranoside(3),alloside of benzyl alcohol(4),3-[(6-O-hexopyranosylhexopyranosyl)oxy]-2-(palmitoyloxy)propyl(9Z,12Z,15Z)-9,12,15-octadecatrienoate(5),apocynoside I(6),quercetin-3-O-β-D-glucopyranoside(7),kaempferol-3-O-β-D-glucopyranoside(8),[1-acetyloxy-3-[3,4,5-trihydroxy-6-[[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxypropan-2-yl]hexadecanoate(9),1-stearoyl-2-palmitoyl-sn-glycerol(10),and 3-hexene-l-O-β-D-glucoside(11)using a series of spectroscopic methods.Compounds 2–5 and 9–11 were isolated for the first time from A.venetum,while antioxidant experiments showed that compounds 1,7,and 8 displayed strong DPPH and ABTS+radical scavenging activities.This study represents the first investigation of bound phenolic compounds with potential health benefits in the residue of A.venetum tea. | Shengwei Sun Yiwen Zhao Luyao Wang Yuzhi Tan Yaning Shi Rita-Cindy Aye-Ayire Sedjoah Yuting Shao Longxiang Li Mengxi Wang Jiashuai Wan Xia Fan Rong Guo Zhihong Xin | 2022 | Food Bioscience2022，47，3： | 0 |
| 6 | Spatio-temporal isolator in lithium niobate on insulator显示文摘In this contribution,we simulate,design,and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide platform.We used two cascaded travelling wave phase modulators for spatiotemporal modulation and a racetrack resonator as a wavelength filter to suppress the sidebands of the reverse propagating light.This enabled us to achieve an isolation of 27 dB.The demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on the insulator waveguide platform. | Haijin Huang Armandas Balčytis Aditya Dubey Andreas Boes Thach GNguyen Guanghui Ren Mengxi Tan Arnan Mitchell | 2023 | Opto-Electronic Science2023，2，3： | 0 |
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