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Fiber-based optical trapping and manipulation

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Frontiers of Optoelectronics 2019年第1期12卷 97-110页

作者： Hongbao XIN baojun li Institute of Nanophotonics Jinan UniversityGuangzhou 511443China

An optical fiber serves as a versatile tool for optical trapping and manipulation owing to its many advantages over conventional optical tweezers,including ease of fabrication,compact configurations,flexible manipulation capabilities,ease of integration,and wide ***,we review recent progress in fiberbased optical trapping and manipulation,which includes mainly photothermal-based and optical-force-based trapping and *** focus on five topics in our review of progress in this area: massive photothermal trapping and manipulation,evanescent-field-based trapping and manipulation,dual-fiber tweezers for singlenanoparticle trapping and manipulation,single-fiber tweezers for single-particle trapping and manipulation,and single-fiber tweezers for multiple-particle/cell trapping and assembly.

关键词： optical trapping photothermal effect optical force cell trapping and assembly

Nanostructured materials with localized surface plasmon resonance for photocatalysis

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Chinese Chemical Letters 2022年第3期33卷 1154-1168页

作者： Juan li Zaizhu Lou baojun li Institute of Nanophotonics Jinan UniversityGuangzhou 511443China State Key Laboratory for Crystal Materials Shandong UniversityJi'nan 250100China

Localized surface plasmon resonance (LSPR) enhanced photocatalysis has fascinated much interest and considerable efforts have been devoted toward the development of plasmonic photocatalysts. In the past decades, noble metal nanoparticles (Au and Ag) with LSPR feature have found wide applications in solar energy conversion. Numerous metal-based photocatalysts have been proposed including metal/semiconductor heterostructures and plasmonic bimetallic or multimetallic nanostructures. However, high cost and scarce reserve of noble metals largely limit their further practical use, which drives the focus gradually shift to low-cost and abundant nonmetallic nanostructures. Recently, various heavily doped semiconductors (such as WO_(3-x), MoO_(3-x), Cu_(2-x)S, TiN) have emerged as potential alternatives to costly noble metals for efficient photocatalysis due to their strong LSPR property in visible-near infrared region. This review starts with a brief introduction to LSPR property and LSPR-enhanced photocatalysis, the following highlights recent advances of plasmonic photocatalysts from noble metal to semiconductor-based plasmonic nanostructures. Their synthesis methods and promising applicability in plasmon-driven photocatalytic reactions such as water splitting, CO_(2) reduction and pollution decomposition are also summarized in details. This review is expected to give guidelines for exploring more efficient plasmonic systems and provide a perspective on development of plasmonic photocatalysis.

关键词： Localized surface plasmon resonance Plasmonic photocatalysis Plasmonic semiconductor Hot electrons Solar energy harvesting

The influence of s-conditionally permutable subgroups on finite groups

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Science China Mathematics 2009年第2期52卷 301-310页

作者： li baojun ZHANG ZhiRang School of Mathematics Chengdu University of Information TechnologyChengdu 610225China

A subgroup H of a group G is called s-conditionally permutable in G if for every Sylow subgroup T of G there exists an element x ∈ G such that HTx = TxH. Using the concept of s-conditionally permutable subgroups, som... 详细信息

关键词： s-conditionally permutable subgroups supersoluble groups finite groups saturated formations 20D10

On f-Hypercentral Actions of Finite Group

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Communications in Mathematics and Statistics 2021年第4期9卷 521-533页

作者： baojun li Lu Gong School of Sciences Nantong UniversityNantong 226019JiangsuPeople’s Republic of China

Let f be a formation function and G an *** is said that A acts f-hypercentrally on G if A acts f-centrally on every A-composition factor of *** this paper,groups are investigated by f-hypercentral *** particular,some ... 详细信息

关键词： Finite group Formation f-hypercentral action Nilpotency

Biophotonic probes for bio-detection and imaging

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light(Science & Applications) 2021年第7期10卷 1185-1206页

作者： Ting Pan Dengyun Lu Hongbao Xin baojun li Institute of Nanophotonics Jinan UniversityGuangzhou 511443China

The rapid development of biophotonics and biomedical sciences makes a high demand on photonic structures to be interfaced with biological systems that are capable of manipulating light at small scales for sensitive detection of biological signals and precise imaging of cellular ***,conventional photonic structures based on artificial materials(either inorganic or toxic organic)inevitably show incompatibility and invasiveness when interfacing with biological *** design of biophotonic probes from the abundant natural materials,particularly biological entities such as virus,cells and tissues,with the capability of multifunctional light manipulation at target sites greatly increases the biocompatibility and minimizes the invasiveness to biological *** this review,advances in biophotonic probes for bio-detection and imaging are *** emphatically and systematically describe biological entities-based photonic probes that offer appropriate optical properties,biocompatibility,and biodegradability with different optical functions from light generation,to light transportation and light *** representative biophotonic probes,i.e.,biological lasers,cell-based biophotonic waveguides and biomicrolenses,are reviewed with applications for bio-detection and ***,perspectives on future opportunities and potential improvements of biophotonic probes are also provided.

关键词： probes precise artificial

On an open problem of Guo-Skiba

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Frontiers of Mathematics in China 2016年第6期11卷 1603-1612页

作者： Zhenfeng WU Wenbin GUO baojun li Department of Mathematics University of Science and Technology of China Hefei 230026 China College of Applied Mathematics Chengdu University of information Technology Chengdu 610225 China

Let G be a finite group, and let A be a proper subgroup of G. Then any chief factor H/AG of G is called a G-boundary factor of A. For any G- boundary factor H/AG of A, the subgroup （A ∩ H）/AG of G/AG is called a G-trace of A. In this paper, we prove that G is p-soluble if and only if every maximal chain of G of length 2 contains a proper subgroup M of G such that either some G-trace of M is subnormal or every G-boundary factor of M is a p′- group. This result give a positive answer to a recent open problem of Guo and Skiba. We also give some new characterizations of p-hypercyclically embedded subgroups.

关键词： Finite group p-hypercyclically embedded subgroup G-boundary factor G-trace of subgroup meet-irreducible subgroup

Some open questions in the theory of generalized permutable subgroups

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Science China Mathematics 2009年第10期52卷 2132-2144页

作者： GUO WenBin XIE FengYan li baojun School of Mathematical Sciences Xuzhou Normal UniversityXuzhou 221116China School of Mathematics Chengdu University of Information TechnologyChengdu 610225China

A subgroup H of a group G is said to be weakly s-supplemented in G if H has a supplement T in G such that H ∩ T HsG, where HsG is the largest s-permutable subgroup of G contained in H. This paper constructs an example to show that the open questions 6.3 and 6.4 in J Algebra, 315: 192–209 (2007) have negative solutions, and shows that in many cases Question 6.4 is positive. A series of known results are unified and generalized.

关键词： finite group formations weakly s-supplemented subgroup maximal subgroup minimal subgroup 20D10 20D20

Pressure swing adsorption/membrane hybrid processes for hydrogen purification with a high recovery

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 255-264页

作者： baojun li Gaohong He Xiaobin Jiang Yan Dai Xuehua Ruan State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology Dalian 116012 China

Hydrogen was recovered and purified from coal gasification-produced syngas using two kinds of hybrid processes： a pressure swing adsorption （PSA）- membrane system （a PSA unit followed by a membrane separation unit） and a membrane-PSA system （a mem- brane separation unit followed by a PSA unit）. The PSA operational parameters were adjusted to control the product purity and the membrane operational parameters were adjusted to control the hydrogen recovery so that both a pure hydrogen product （〉 99.9%） and a high recovery （〉 90%） were obtained simultaneously. The hybrid hydrogen purification processes were simulated using HYSYS and the processes were evaluated in terms of hydrogen product purity and hydrogen recovery. For comparison, a PSA process and a membrane separation process were also used individually for hydrogen purifica- tion. Neither process alone produced high purity hydrogen with a high recovery. The PSA-membrane hybrid process produced hydrogen that was 99.98% pure with a recovery of 91.71%, whereas the membrane-PSA hybrid process produced hydrogen that was 99.99% pure with a recovery of 91.71%. The PSA-membrane hybrid process achieved higher total H2 recoveries than the membrane-PSA hybrid process under the same H2 recovery of membrane separation unit. Meanwhile, the membrane-PSA hybrid process achieved a higher total H2 recovery （97.06%） than PSA-membrane hybrid process （94.35%） at the same H2 concentration of PSA feed gas （62.57%）.

关键词： hydrogen purification PSA membrane separation hybrid process

Co-CoO_x supported onto TiO_(2) coated with carbon as a catalyst for efficient and stable hydrogen generation from ammonia borane

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Green Energy & Environment 2021年第2期6卷 236-243页

作者： Guang Yang Shuyan Guan Sehrish Mehdi Yanping Fan Baozhong liu baojun li College of Chemistry and Chemical Engineering Henan Polyteclnic Universiny2001 Century AvenueJiaozuo454000China Department of Chemistry The Women University Kutchery CampusLM.Q RoadMultan66000 Pakistan College of Chemistry Zhengzhou Universiry 100 Science Road Zhengzhou450001China

Ammonia borane(AB) can be catalytically hydrolyzed to provide hydrogen at room temperature due to its high potentaial for hydrogen storage. Non-precious metal heterogeneous catalysts have broad application in the field of energy catalysis. In this article, catalysts precursor is obtained from Co-Ti-resorcinol-formaldehyde resin by sol–gel method. Co/TiO_(2)@N-C(CTC) catalyst is prepared by calcining the precursor under high temperature conditions in nitrogen atmosphere. Co-CoO_x/TiO_(2)@N-C(COTC) is generated by the controllable oxidation reaction of CTC. The catalyst can effectively promote the release of hydrogen during the hydrolytic dehydrogenation of AB. High hydrogen generation at a specific rate of 5905 m L min^(-1) g_(Co)^(-1) is achieved at room temperature. The catalyst retains its 85% initial catalytic activity even for its fifth time use in AB hydrolysis. The synergistic effect among Co, Co_(3)O_(4) and TiO_(2) promotes the rate limiting step with dissociation and activation of water molecules by reducing its activation energy. The applied method in this study promotes the development of non-precious metals in catalysis for utilization in clean energy sources.

关键词： Ammonia borane Cobalt Hydrogen generation N-doped carbon Titanium dioxide