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dissolvable temporary barrier:a novel paradigm for flexible hydrogel patterning in organ-on-a-chip models

Bio-Design and Manufacturing 2024年第2期7卷 153-166页

作者： ding Wang Qinyu Li Chenyang Zhou Zhangjie Li Kangyi Lu Yijun Liu lian Xuan Xiaolin Wang Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Ophthalmology LKS Faculty of MedicineThe University of Hong KongHong Kong 999077China Institute of Medical Robotics Shanghai Jiao Tong UniversityShanghai 200240China National Key Laboratory of Advanced Micro and Nano Manufacture Technology Shanghai Jiao Tong UniversityShanghai 200240China National Center for Translational Medicine(Shanghai)SHU Branch Shanghai UniversityShanghai 200444China

A combination of hydrogels and microfluidics allows the construction of biomimetic three-dimensional(3D)tissue models in vitro,which are also known as *** hydrogel patterningwith awell-controlled spatial distribution is typically achieved by embedding sophisticated microstructures to act as a ***,these physical barriers inevitably expose cells/tissues to a less physiologically relevant microenvironment than in vivo ***,we present a novel dissolvable temporary barrier(DTB)strategy that allows robust and flexible hydrogel patterning with great freedom of design and desirable flow stimuli for cellular *** key aspect of this approach is the patterning of a water-soluble rigid barrier as a guiding path for the hydrogel using stencil printing technology,followed by a barrier-free medium perfusion after the dissolution of the *** and multiple tissue compartments with different geometries can be established using either straight or curved DTB *** effectiveness of this strategy is further validated by generating a 3D vascular network through vasculogenesis and angiogenesis using a vascularized microtumor *** a new proof-of-concept in vasculature-on-a-chip,DTB enables seamless contact between the hydrogel and the culture medium in closed microdevices,which is an improved protocol for the fabrication ofmultiorgan ***,we expect it to serve as a promising paradigm for organ-on-a-chip devices for the development of tumor vascularization and drug evaluation in the future preclinical studies.

关键词： dissolvable temporary barrier Hydrogel patterning Microfluidics Organ-on-a-chip Vascularization

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Highly Porous Yet Transparent Mechanically Flexible Aerogels Realizing Solar-Thermal Regulatory Cooling

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Nano-Micro Letters 2024年第7期16卷 231-243页

作者： Meng lian Wei ding Song Liu Yufeng Wang Tianyi Zhu Yue-EMiao Chao Zhang Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China

The demand for highly porous yet transparent aerogels with mechanical flexibility and solar-thermal dual-regulation for energy-saving windows is significant but ***,a delaminated aerogel film(DAF)is fabricated through filtration-induced delaminated gelation and ambient *** delaminated gelation process involves the assembly of fluorinated cellulose nanofiber(FCNF)at the solid-liquid interface between the filter and the filtrate during filtration,resulting in the formation of lamellar FCNF hydrogels with strong intra-plane and weak interlayer hydrogen *** exchanging the solvents from water to hexane,the hydrogen bonding in the FCNF hydrogel is further enhanced,enabling the formation of the DAF with intra-layer mesopores upon ambient *** resulting aerogel film is lightweight and ultra-flexible,which pos-sesses desirable properties of high visible-light transmittance(91.0%),low thermal conductivity(33 mW m^(-1) K^(-1)),and high atmospheric-window emissivity(90.1%).Furthermore,the DAF exhibits reduced surface energy and exceptional hydrophobicity due to the presence of fluorine-containing groups,enhancing its durability and UV ***,the DAF has demonstrated its potential as solar-thermal regulatory cooling window materials capable of simultaneously providing indoor lighting,thermal insulation,and daytime radiative cooling under direct ***,the enclosed space protected by the DAF exhibits a temperature reduction of 2.6℃ compared to that shielded by conventional architectural glass.

关键词： Transparent aerogel Cellulose nanofiber aerogel Delaminated gelation Thermal insulation Passive daytime radiative cooling

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Peripheral carbazole units-decorated MR emitter containing B−N covalent bond for highly efficient green OLEDs with low roll-off

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Journal of Semiconductors 2024年第8期45卷 59-66页

作者： Danrui Wan Jianping Zhou Guoyun Meng Ning Su Dongdong Zhang lian Duan Junqiao ding School of Chemical Science and Technology Yunnan UniversityKunming 650091China Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China Southwest United Graduate School Kunming 650092China

Boron−nitrogen doped multiple resonance(BN-MR)emitters,characterized by B−N covalent bonds,offer distinctive advantages as pivotal building blocks for facile access to novel MR emitters featuring narrowband spectra and high ***,there remains a scarcity of exploration concerning synthetic methods and structural derivations to expand the library of novel BN-MR ***,we present the synthesis of a BN-MR emitter,tCz[B−N]N,through a one-pot borylation reaction directed by the amine group,achieving an impressive yield of 94%.The emitter is decorated by incorporating two 3,6-di-tbutylcarbazole(tCz)units into a B−N covalent bond doped BN-MR parent molecule via para-C−π−D and para-N−π−D *** peripheral decoration strategy enhances the reverse intersystem crossing process and shifts the emission band towards the pure green region,peaking at 526 nm with a narrowband full-width at half maximum(FWHM)of 41 ***,organic light emitting diodes(OLEDs)employing this emitter achieved a maximum external quantum efficiency(EQEmax)value of 27.7%,with minimal efficiency *** at a practical luminance of 1000 cd·m^(−2),the device maintains a high EQE value of 24.6%.

关键词： multi-resonance narrowband emission B−N covalent bond organic light emitting diodes

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Wideband Circularly Polarized Substrate-Integrated Waveguide Aperture-Coupled Metasurface Antenna Array for Millimeter-Wave Applications

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Chinese Journal of Electronics 2024年

作者： Jiwei lian Chun GENG Xue LU Dazhi ding School of Microelectronics (School of Integrated Circuits) Nanjing University of Science and Technology State Key Laboratory of Millimeter Waves Southeast University Qian Xuesen College Nanjing University of Science and Technology

A wideband circularly polarized(CP) aperture-coupled metasurface antenna operating at millimeterwave frequency spectrum in substrate-integrated waveguide(SIW) technology is proposed. Such a proposed metasurface antenna is composed of two substrates. The first substrate contains an end-shorted SIW section with a slot etched. The introduced metasurface is printed on the top of the second substrate. The metasurface is comprised of3 × 3 unit cells, each of which contains two interconnected patches and two parasitic patches. The working mechanism of the proposed metasurface antenna is illustrated in details. The proposed metasurface antenna has wide impedance bandwidth and axial ratio(AR) bandwidth, which are 66.7% and 40%, respectively. Using the proposed metasurface antenna, a 4 × 4 CP metasurface antenna array with an impedance bandwidth of 24%, an AR bandwidth of 30%, and a peak gain of 18.7 dBic in simulation is developed in this paper for millimeter-wave applications.

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The role of primary cilia in mechanical transmission of osteocyte based on a 3D finite element model

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Medicine in Novel Technology and Devices 2024年第1期21卷 31-38页

作者： Zhuang Han Dong ding Yu-bo Fan Xin-tong Wu Xiao Yang lian-wen Sun Key Laboratory of Biomechanics and Mechanobiology(Beihang University)Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China Department of Cardiology State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

The primary cilium,as a mechanical receptor of osteocytes,participates in the regulation of osteocyte ***,how the length of osteocyte primary cilia changes with fluid shear stress(FSS)are unclear,and how the mechanical transmission within osteocytes altered by primary cilia is not well understood ***,the ciliary length changes of osteocyte under 15dyn/cm2 of FSS were experimentally detected,and then 3D finite element models of osteocyte primary cilia containing the basal body and axoneme were *** results showed that(1)The ciliary length of the CON group,FSS 1h,and FSS 6h were 3.71±1.34μm,3.79±1.04μm,and 1.24±0.73μm respectively,indicating the different durations of FSS might lead to the adaptive changes of cilium *** calculations showed(2)when the ciliary length became shorter with the ciliary angle stayed the same,the deformation and stress of the cell membrane and membrane skeleton was ***,the deformation and stress of the cilia membrane,basal body,the rotation angles of basal body were decreased,and those of cytoplasm,cytoskeleton,actin cortex and nucleus were also decreased;(3)With the decrease of the ciliary angle,the deformation and stress of the cilia membrane,basal body,as well as the rotation angles of basal body were *** of the cytoplasm,cytoskeleton,actin cortex,and nucleus were also increased except the cell membrane and membrane *** calculation results suggested the length and angle of the primary cilia,the deformation and stress of intracellular structures in osteocyte were altered with ciliary basal body,indicated the connection between the basal body and cytoskeleton may be a key factor that affected the mechanical transport in osteocytes across the cell *** finally promoted the adaptive change of ciliary length under FSS.

关键词： Primary cilia Osteocyte model Finite element analysis Mechanotransduction

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Inhibiting the phase transition of WO_(3)for highly stable aqueous electrochromic battery

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Journal of Energy Chemistry 2024年第8期95卷 86-95,I0003页

作者： Zhisheng Wu Zhendong lian Ting ding Jielei Li Jincheng Xu Jinxiao Wang liangxing Zhang Bo Wang Shi Chen Peng Xiao Hua Xu Shuang-Peng Wang Kar Wei Ng Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeMacao 999078China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020GuangdongChina Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology School of Physics and Optoelectronic EngineeringFoshan UniversityFoshan 528225GuangdongChina Guangzhou New Vision Optoelectronic Technology Co. Ltd.Guangzhou 510530GuangdongChina

Aqueous electrochromic battery(ECB)has shown intense potential for achieving energy storage and saving *** tungsten oxide(WO_(3))is the most promising EC material for commercialization,the cycling stability of WO_(3)-based aqueous ECBs is currently unsatisfactory due to the repeated phase transition during the redox process and the corrosion by acidic ***,we present a titanium-tungsten oxide alloy(Ti-WO_(3))with controllable morphology and crystal phase synthesized by a facile hot injection method to overcome the *** contrast to conventional monoclinic WO_(3),the Ti-WO_(3)nanorods can stably maintain their cubic crystal phase during the redox reaction in an acidic electrolyte,thus leading to dramatically enhanced response speed and cycling stability,Specifically,when working in a well-matched hybrid Al^(3+)/Zn^(2+)aqueous electrolyte,our phasetransition-free cubic Ti-WO_(3)exhibits an ultra-high cycling stability(>20000 cycles),fast response speed(3,95 s/4,65 s for bleaching/coloring),as well as excellent discharge areal capacity of 214.5 mA h m^(-2),We further fabricate a fully complementa ry aqueous electrochromic device,for the first time,using a Ti-WO_(3)/Prussian blue device ***,the complementary ECB shows>10000 stable operation cycles,attesting to the feasibility of our Ti-WO_(3)for practical *** work validates the significance of inhibiting the phase transitions of WO_(3)during the electrochromic process for realizing highly cyclable aqueous ECB,which can possibly provide a generalized design guidance for other high-quality metallic oxides for electrochemical applications.

关键词： Aqueous electrochromic battery Ti-WO_(3) Phase transition Long-term stability

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Analysis on the status and influencing factors of undergraduate nursing students’ online learning engagement in the context of the pandemic

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TMR Integrative Nursing 2021年第4期5卷 120-126页

作者： lian-di ding Ming-Jin Li School of Nursing Yanbian UniversityYanjiJilinChina

Objective:This project has mainly studied the online learning engagement of undergraduate nursing students and analyzes influencing factors of online learning and teaching mode during the Novel Coronavirus(COVID-19).This research has significant references for improving the efficiency and quality of the online learning mode of ***:In this study,212 undergraduate nursing students were selected from a comprehensive university in Jilin Province by combining convenience sampling and cluster sampling *** these students were conducted with a general information questionnaire,Online Academic Emotion Scale,and Online Learning Engagement *** influencing factors of this teaching mode were analyzed by multiple linear stepwise ***:The total score of online learning engagement of undergraduate students was 53.85±7.38,which positively correlated with positive high arousal emotion and negative high arousal emotion,but weakly negatively correlated with negative low arousal emotion(r=0.661,0.246,-0.187,Pdividuation characters of nursing students,and motivate their positively high arousal emotion to improve online learning engagement of students to ensure the quality of online teaching mode.

关键词： Undergraduate nursing students Online learning engagement Online academic emotion Root cause analysis

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Clinical efficacy and safety of flexible ureteroscopy and percutaneous nephrolithotomy for large kidney stones:A retrospective comparative study

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World Journal of Clinical Cases 2024年第21期12卷 4483-4490页

作者： Qiu-lian Wang Jun-Qiang Liu Juan Cao Jun ding Department of Urology No.904 Hospital of Joint Logistic Support Force of PLAWuxi 214044Jiangsu ProvinceChina

BACKGROUND Renal stones ranging 20–40 mm are very common in *** no largesample clinical studies have confirmed the clinical efficacy and safety of this method,there is also a lack of comparative data with traditional *** To investigate the clinical efficacy of flexible ureteroscopy(FURS)and percutaneous nephrolithotomy(PCNL)by postoperative stone clearance and changes in soluble vascular cell adhesion molecule 1(sVCAM-1)and kidney injury molecule 1(KIM-1)levels in patients with large kidney stones(>2 cm in diameter).METHODS This single-center observational study was performed at a Chinese hospital between January 1,2021,and October 30,*** 250 enrolled patients were diagnosed with large kidney stones(>2 cm)and divided into a FURS group(n=145)and a PCNL group(n=105)by the surgical *** FURS group was treated with flexible ureteroscopy and the PCNL group was treated with percutaneous *** operation time,time to palinesthesia,intraoperative blood loss,drop in hemoglobin,length of hospital stay,stone clearance rate,and complications were recorded in the two *** and postoperative serum sVCAM-1 levels,erythrocyte sedimentation rate(ESR),urine KIM-1 levels,preoperative and postoperative pain visual analog scale(VAS)and Wisconsin Stone Quality of Life Questionnaire(WISQOL)scores were also *** All 250 eligible patients completed the *** were no significant differences in baseline characteristics between the two groups(P>0.05).The operation time in the FURS group was significantly greater than that in the PCNL *** time to ambulation,intraoperative blood loss,decrease in hemoglobin,and length of hospital stay were significantly lower in the FURS group than in the PCNL *** FURS group also had a significantly higher stone clearance rate and a lower incidence of postoperative *** was no significant difference in antibiotic use between the *** serum

关键词： Kidney stones Flexible ureteroscopy Percutaneous nephrolithotomy Clinical effective SCM-1 Erythrocyte sedimentation rate Kidney injury molecule 1

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Plasmonic Ag nanoparticles decorated MIL-101(Fe) for enhanced photocatalytic degradation of bisphenol A with peroxymonosulfate under visible-light irradiation

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Chinese Chemical Letters 2024年第1期35卷 418-423页

作者： Yan Gong Yu ding Qi Tang Fei lian Chun Bai Ruiyi Xie Haijiao Xie Xu Zhao School of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Hangzhou Yanqu Information Technology Co. Ltd.Hangzhou 310003China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Collapse

Photocatalytic activation of peroxymonosulfate (PMS) has garnered a lot of interest in the field of wastewater treatment. Herein, a plasmonic Ag nanoparticles decorated MIL-101(Fe) hybrid was synthesized through a photodeposition process. Upon light irradiation, the Ag/MIL-101(Fe) exhibit reinforced photocatalytic activities for elimination of bisphenol A (BPA) with PMS. The optimized 2.0% Ag/MIL-101(Fe) composite presented the highest photocatalytic activity with kinetic constant k of 0.102 min-1, which was about 10-fold of the pristine MIL-101(Fe). Loading of plasmonic Ag into MIL-101(Fe) boosts photoinduced carrier separation and accelerates PMS activation to generate strong oxidative radicals. Photoelectrochemical tests and multiple spectroscopic studies confirmed the promoted charge carrier separation and transfer capability of Ag/MIL-101(Fe). Combining the results of radical trapping experiments and electron spin resonance (ESR), the formed SO4·-, ·OH, ·O2- and 1O2 had a significant role in the photocatalytic process. According to intermediate study, the degradation pathway was studied, and the possible mechanism was proposed.

关键词： Photocatalysis MOF Peroxymonosulfate Plasmonic Ag BPA

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EC、PC溶剂在石墨表面反应的第一性原理研究

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电源技术 2024年第5期48卷 857-861页

作者：丁爽刘恋周江中电科蓝天科技股份有限公司天津300384

基于第一性原理利用密度泛函理论对溶剂EC、PC和EMC的电子性质及其与石墨负极的反应进行了理论计算。相较于EC和EMC溶剂,PC具有更小的带隙,最容易发生电子跃迁进而发生氧化还原反应。EC和EMC溶剂分子嵌入石墨层中仅仅扩大了石墨的层间距... 详细信息

基于第一性原理利用密度泛函理论对溶剂EC、PC和EMC的电子性质及其与石墨负极的反应进行了理论计算。相较于EC和EMC溶剂,PC具有更小的带隙,最容易发生电子跃迁进而发生氧化还原反应。EC和EMC溶剂分子嵌入石墨层中仅仅扩大了石墨的层间距,而PC嵌入后与石墨发生了反应,破坏了石墨结构。随着充电程度的增加,PC与石墨的反应能减小,石墨结构更容易被破坏。比较了锂离子和钠离子的溶剂化能和嵌入石墨的反应能。计算结果显示:电解液中的杂质钠离子具有更小的去溶剂化能,在石墨负极表面与锂离子发生竞争,优先嵌入到石墨中,阻碍锂离子嵌入。

关键词：碳酸乙烯酯碳酸丙烯酯石墨负极密度泛函理论

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