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  1. AU="Shan, Chongxin"
  2. AU="Arora, Vineet M"
  3. AU="Carey, Alanna"
  4. AU="Habash, Khader I"
  5. AU="Angela Ribeiro"
  6. AU="Radomir Živadinović"
  7. AU=Shakeri Ahmad

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  1. Artikel ; Online: Viral inactivation by irradiation rays.

    Liu, Kai-Kai / Shan, Chong-Xin

    Light, science & applications

    2023  Band 12, Heft 1, Seite(n) 72

    Abstract: Viral infection can lead to serious illness and death around the world, as exemplified by the spread of COVID-19. Using irradiation rays can inactive virions through ionizing and non-ionizing effect. The application of light in viral inactivation and the ...

    Abstract Viral infection can lead to serious illness and death around the world, as exemplified by the spread of COVID-19. Using irradiation rays can inactive virions through ionizing and non-ionizing effect. The application of light in viral inactivation and the underlying mechanisms are reviewed by the research group of Dayong Jin from University of Technology Sydney.
    Sprache Englisch
    Erscheinungsdatum 2023-03-14
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2662628-7
    ISSN 2047-7538 ; 2047-7538
    ISSN (online) 2047-7538
    ISSN 2047-7538
    DOI 10.1038/s41377-023-01108-3
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Photoacoustic trace gas detection of OCS using a 2.45 mL Helmholtz resonator and a 4823.3 nm ICL light source.

    Gao, Zijian / Li, Lei / Liu, Minghui / Tian, Shen / Feng, Mingyang / Qiao, Yingying / Shan, Chongxin

    Photoacoustics

    2024  Band 38, Seite(n) 100612

    Abstract: A miniaturized photoacoustic spectroscopy-based gas sensor is proposed for the purpose of detecting sub-ppm-level carbonyl sulfide (OCS) using a tunable mid-infrared interband cascade laser (ICL) and a Helmholtz photoacoustic cell. The tuning ... ...

    Abstract A miniaturized photoacoustic spectroscopy-based gas sensor is proposed for the purpose of detecting sub-ppm-level carbonyl sulfide (OCS) using a tunable mid-infrared interband cascade laser (ICL) and a Helmholtz photoacoustic cell. The tuning characteristics of the tunable ICL with a center wavelength of 4823.3 nm were investigated to achieve the optimal driving parameters. A Helmholtz photoacoustic cell with a volume of ∼2.45 mL was designed and optimized to miniaturize the measurement system. By optimizing the modulation parameters and signal processing, the system was verified to have a good linear response to OCS concentration. With a lock-in amplifier integration time of 10 s, the 1σ noise standard deviation in differential mode was 0.84 mV and a minimum detection limit (MDL) of 409.2 ppbV was achieved at atmospheric pressure and room temperature.
    Sprache Englisch
    Erscheinungsdatum 2024-04-29
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 2716706-9
    ISSN 2213-5979
    ISSN 2213-5979
    DOI 10.1016/j.pacs.2024.100612
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Microscopic Understanding of the Growth and Structural Evolution of Narrow Bandgap III-V Nanostructures.

    Zhang, Leilei / Li, Xing / Cheng, Shaobo / Shan, Chongxin

    Materials (Basel, Switzerland)

    2022  Band 15, Heft 5

    Abstract: III-V group nanomaterials with a narrow bandgap have been demonstrated to be promising building blocks in future electronic and optoelectronic devices. Thus, revealing the underlying structural evolutions under various external stimuli is quite necessary. ...

    Abstract III-V group nanomaterials with a narrow bandgap have been demonstrated to be promising building blocks in future electronic and optoelectronic devices. Thus, revealing the underlying structural evolutions under various external stimuli is quite necessary. To present a clear view about the structure-property relationship of III-V nanowires (NWs), this review mainly focuses on key procedures involved in the synthesis, fabrication, and application of III-V materials-based devices. We summarized the influence of synthesis methods on the nanostructures (NWs, nanodots and nanosheets) and presented the role of catalyst/droplet on their synthesis process through in situ techniques. To provide valuable guidance for device design, we further summarize the influence of structural parameters (phase, defects and orientation) on their electrical, optical, mechanical and electromechanical properties. Moreover, the dissolution and contact formation processes under heat, electric field and ionic water environments are further demonstrated at the atomic level for the evaluation of structural stability of III-V NWs. Finally, the promising applications of III-V materials in the energy-storage field are introduced.
    Sprache Englisch
    Erscheinungsdatum 2022-03-04
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15051917
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Active Frequency Measurement on Superradiant Strontium Clock Transitions.

    Zhang, Yuan / Shan, Chongxin / Mølmer, Klaus

    Physical review letters

    2022  Band 128, Heft 1, Seite(n) 13604

    Abstract: We develop a stochastic mean-field theory to describe active frequency measurements of pulsed superradiant emission, studied in a recent experiment with strontium-87 atoms trapped in an optical lattice inside an optical cavity [M. Norcia et al., Phys. ... ...

    Abstract We develop a stochastic mean-field theory to describe active frequency measurements of pulsed superradiant emission, studied in a recent experiment with strontium-87 atoms trapped in an optical lattice inside an optical cavity [M. Norcia et al., Phys. Rev. X 8, 021036 (2018)PRXHAE2160-330810.1103/PhysRevX.8.021036]. Our theory reveals the intriguing dynamics of atomic ensembles with multiple transition frequencies, and it reproduces the superradiant beats signal, noisy power spectra, and frequency uncertainty in remarkable agreement with the experiments. Moreover, using longer superradiant pulses of similar strength and shortening the experimental duty cycle, we predict a short-term frequency uncertainty 7×10^{-17}/sqrt[τ/s], which makes active frequency measurements with superradiant transitions comparable with the record performance of current frequency standards [M. Schioppo et al., Nat. Photonics 11, 48 (2017)NPAHBY1749-488510.1038/nphoton.2016.231]. Our theory combines cavity quantum electrodynamics and quantum measurement theory, and it can be readily applied to explore conditional quantum dynamics and describe frequency measurements for other processes such as steady-state superradiance and superradiant Raman lasing.
    Sprache Englisch
    Erscheinungsdatum 2022-01-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.013604
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Ultranarrow Superradiant Lasing by Dark Atom-Photon Dressed States.

    Zhang, Yuan / Shan, Chongxin / Mølmer, Klaus

    Physical review letters

    2021  Band 126, Heft 12, Seite(n) 123602

    Abstract: We show that incoherent pumping of an optical lattice clock system with ultracold strontium-88 atoms produces laser light with a ≃10  Hz linewidth when the atoms are exposed to a magnetic field. This linewidth is orders of magnitude smaller than both the ...

    Abstract We show that incoherent pumping of an optical lattice clock system with ultracold strontium-88 atoms produces laser light with a ≃10  Hz linewidth when the atoms are exposed to a magnetic field. This linewidth is orders of magnitude smaller than both the cavity linewidth and the incoherent atomic decay and excitation rates. The narrow lasing is due to an interplay of multiatom superradiant effects and the coupling of bright and dark atom-light dressed states by the magnetic field.
    Sprache Englisch
    Erscheinungsdatum 2021-03-23
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.126.123602
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Sensitivity-enhanced Fabry-Perot interferometric fiber-optic microphone using hollow cantilever.

    Tian, Shen / Qiao, Yingying / Liang, Mu / Feng, Mingyang / Gao, Yang / Li, Lei / Shan, Chongxin

    Optics express

    2023  Band 31, Heft 13, Seite(n) 21796–21805

    Abstract: Transducer components are crucial in optimizing the sensitivity of microphones. Cantilever structure is commonly used as a structural optimization technique. Here, we present a novel Fabry-Perot (F-P) interferometric fiber-optic microphone (FOM) using a ... ...

    Abstract Transducer components are crucial in optimizing the sensitivity of microphones. Cantilever structure is commonly used as a structural optimization technique. Here, we present a novel Fabry-Perot (F-P) interferometric fiber-optic microphone (FOM) using a hollow cantilever structure. The proposed hollow cantilever aims to reduce the effective mass and spring constant of the cantilever, thereby enhancing the sensitivity of the FOM. Experimental results demonstrate that the proposed structure outperforms the original cantilever design in terms of sensitivity. The sensitivity and minimum detectable acoustic pressure level (MDP) can reach 91.40 mV/Pa and 6.20 µPa/Hz at 1.7 kHz, respectively. Notably, the hollow cantilever provides an optimization framework for highly sensitive FOMs.
    Sprache Englisch
    Erscheinungsdatum 2023-06-28
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.492026
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Thermally Enhanced Phosphorescent Carbon Nanodots for Monitoring Cold-Chain Logistics.

    Liang, Ya-Chuan / Shao, Hao-Chun / Liu, Kai-Kai / Cao, Qing / Jiang, Li-Ying / Shan, Chong-Xin / Kuang, Le-Man / Jing, Hui

    Small (Weinheim an der Bergstrasse, Germany)

    2024  , Seite(n) e2312218

    Abstract: Room-temperature phosphorescent materials, renowned for their long luminescence lifetimes, have garnered significant attention in the field of optical materials. However, the challenges posed by thermally induced quenching have significantly hindered the ...

    Abstract Room-temperature phosphorescent materials, renowned for their long luminescence lifetimes, have garnered significant attention in the field of optical materials. However, the challenges posed by thermally induced quenching have significantly hindered the advancement of luminescence efficiency and stability. In this study, thermally enhanced phosphorescent carbon nanodots (CND) are developed by incorporating them into fiber matrices. Remarkably, the phosphorescence lifetime of the thermally enhanced CND exhibits a twofold enhancement, increasing from 326 to 753 ms, while the phosphorescence intensity experienced a tenfold enhancement, increasing from 25 to 245 as the temperature increased to 373 K. Rigid fiber matrices can effectively suppress the non-radiative transition rate of triplet excitons, while high temperatures can desorb oxygen adsorbed on the surface of the CND, disrupting the interaction between the CND and oxygen. Consequently, a thermally enhanced phosphorescence is obtained. In addition, benefiting from the thermally enhanced phosphorescence property of CND, a warning indicator with an anti-counterfeiting function for monitoring cold-chain logistics is demonstrated based on CND.
    Sprache Englisch
    Erscheinungsdatum 2024-05-08
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202312218
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel: Superhydrophobic Nanodiamond-Functionalized Melamine Sponge for Oil/Water Separation

    Wang, Hui / Zhao, Qi / Zhang, Kuikui / Wang, Futao / Zhi, Jinfang / Shan, Chong-Xin

    Langmuir. 2022 Sept. 07, v. 38, no. 37

    2022  

    Abstract: Fabrication of absorbent materials foroil/water separation is an important ecological pursuit for oil spill clean-up and organic pollutants’ removal. In this study, nanodiamonds (NDs), a promising member of the carbon family, were functionally modified ... ...

    Abstract Fabrication of absorbent materials foroil/water separation is an important ecological pursuit for oil spill clean-up and organic pollutants’ removal. In this study, nanodiamonds (NDs), a promising member of the carbon family, were functionally modified by the covalent linking of octadecylamine (ODA). Subsequently, the superhydrophobic sponge with hierarchical microstructures was fabricated by embedding ND-ODA into a melamine sponge (MS) skeleton via a simple immersion-drying process. The as-prepared sponge (ND-ODA@PDMS@MS) showed superhydrophobic properties with a water contact angle of 155 ± 2°. For various oils and organic solvents, ND-ODA@PDMS@MS possesses excellent absorption capacity (26.65–55.64 g/g) and oil/water separation efficiency (above 98.6%). Furthermore, the adsorption capacity to crude oil remained relatively stable in highly acidic, alkaline, and salty conditions, ensuring the application in the clean-up of industrial oily sewages and marine oil spills. Besides absorbing oil for a single time, ND-ODA@PDMS@MS also exhibited satisfactory performance in continuous oil/water separation. Therefore, this work provides a facile strategy to produce robust and efficient absorbent materials for oil/water separation in large-scale oil and organic solvent clean-ups.
    Schlagwörter absorbents ; absorption ; adsorption ; carbon ; contact angle ; hydrophobicity ; melamine ; nanodiamonds ; oil spills ; oils ; petroleum ; skeleton ; solvents
    Sprache Englisch
    Erscheinungsverlauf 2022-0907
    Umfang p. 11304-11313.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.2c01480
    Datenquelle NAL Katalog (AGRICOLA)

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  9. Artikel ; Online: Electron-hole plasma Fabry-Perot lasing in a Ga-incorporated ZnO microbelt via Ag nanoparticle deposition.

    Sun, Yuzhou / Jiang, Mingming / Li, Binghui / Xie, Xiuhua / Shan, Chongxin / Shen, Dezhen

    Optics express

    2022  Band 30, Heft 2, Seite(n) 740–753

    Abstract: In this work, individual ZnO via Ga-doped (ZnO:Ga) microbelts with excellent crystallinity and smooth facets can enable the realization of lateral microresonator Fabry-Perot (F-P) microlasers, and the F-P lasing action originates from excitonic state. ... ...

    Abstract In this work, individual ZnO via Ga-doped (ZnO:Ga) microbelts with excellent crystallinity and smooth facets can enable the realization of lateral microresonator Fabry-Perot (F-P) microlasers, and the F-P lasing action originates from excitonic state. Interestingly, introducing Ag nanoparticles (AgNPs) deposited on the microbelt can increase F-P lasing characteristics containing a lower threshold and enhanced lasing output. Especially for the large size AgNPs (the diameter d is approximately 200 nm), the lasing features also exhibit a significant redshift of each lasing peak and an observable broadening of the spectral line width with an increase of the excitation fluence. And the remarkable lasing characteristics are belonging to the electron-hole plasma (EHP) luminescence. The behavior and dynamics of the stimulated radiation in an AgNPs@ZnO:Ga microbelt are studied, suggesting the Mott-transition from the excitonic state to EHP state that is responsible for the F-P lasing. These features can be attributed to the working mechanism that the hot electrons created by the large size AgNPs through nonradiative decay can fill the conduction band of nearby ZnO:Ga, leading to a downward shift of the conduction band edge. This novel filling influence can facilitate bandgap renormalization and result in EHP emission. The results provide a comprehensive understanding of the transition between excitonic and EHP states in the stimulated emission process. More importantly, it also can provide new scheme to developing high efficiency and ultra-low threshold microlasing diodes.
    Sprache Englisch
    Erscheinungsdatum 2022-02-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.440628
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel: Sensitivity enhanced NIR photoacoustic CO detection with SF

    Qiao, Yingying / Tang, Liping / Gao, Yang / Han, Fengtao / Liu, Chenguang / Li, Lei / Shan, Chongxin

    Photoacoustics

    2022  Band 25, Seite(n) 100334

    Abstract: A challenge for slowly relaxing carbon monoxide (CO) molecules detection using photoacoustic spectroscopy (PAS) is to promote the vibration-translation (V-T) relaxation process. Addressing this challenge, a sensitivity enhanced photoacoustic CO sensor ... ...

    Abstract A challenge for slowly relaxing carbon monoxide (CO) molecules detection using photoacoustic spectroscopy (PAS) is to promote the vibration-translation (V-T) relaxation process. Addressing this challenge, a sensitivity enhanced photoacoustic CO sensor with sulfur hexafluoride (SF
    Sprache Englisch
    Erscheinungsdatum 2022-02-08
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 2716706-9
    ISSN 2213-5979
    ISSN 2213-5979
    DOI 10.1016/j.pacs.2022.100334
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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