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| 1 | Amino-functionalized poloxamer 407 with both mucoadhesive and thermosensitive properties:preparation, characterization and application in a vaginal drug delivery system显示文摘Lack of mucoadhesive properties is the major drawback to poloxamer 407(F127)-based in situ hydrogels for mucosal administration. The objective of the present study was to construct a novel mucoadhesive and thermosensitive in situ hydrogel drug delivery system based on an aminofunctionalized poloxamer for vaginal administration. First, amino-functionalized poloxamer 407(F127-NH2) was synthesized and characterized with respect to its micellization behavior and interaction with mucin. Then using acetate gossypol(AG) as model drug, AG-loaded F127-NH2-based in situ hydrogels(NFGs) were evaluated with respect to rheology, drug release, ex vivo vaginal mucosal adhesion, in vivo intravaginal retention and local irritation after vaginal administration to healthy female mice. The results show that F127-NH2 is capable of forming a thermosensitive in situ hydrogel with sustained drug release properties. An interaction between positively charged F127-NH2 and negatively charged mucin wasrevealed by changes in the particle size and zeta potential of mucin particles as well as an increase in the complex modulus of NFG caused by mucin. Ex vivo and in vivo fluorescence imaging and quantitative analysis of the amount of AG remaining in mouse vaginal lavage all demonstrated greater intravaginal retention of NFG than that of an unmodified F127-based in situ hydrogel. In conclusion, amino group functionalization confers valuable mucoadhesive properties on poloxamer 407. | Liqian Ci Zhigang Huang Yu Liub Zhepeng Liu Gang Wei Weiyue Lu | 2017 | Acta Pharmaceutica Sinica B2017，7，5： | 11 |
| 2 | Application of chemical vapor-deposited monolayer ReSe2 in the electrocatalytic hydrogen evolution reaction显示文摘 | Shaolong Jiang Zhepeng Zhang Na Zhang Yahuan Huan Yue Gong Mengxing Sun Jianping Shi Chunyu Xie Pengfei Yang Qiyi Fang He Li Lianming Tong Dan Xie Lin Gu Porun Liu Yanfeng Zhang | 2018 | Nano Research2018，11，4： | 6 |
| 3 | Fast and uniform growth of graphene glass using confined-flow chemical vapor deposition and its unique applications显示文摘常规玻璃上的高质量的 graphene 的快、一致的生长为 graphene 玻璃的实际应用程序是很重要的。我们此处为 graphene 玻璃的高效率的制造报导一条范围流动化学药品蒸汽免职(CVD ) 途径。我们的途径的特色是 2-4 m 的制造在玻璃底层上面的宽差距,与很多的跌倒块;这差距被发现显著地增加在对方之间并且与玻璃表面的碳先锋和反应碎片的碰撞概率。作为结果, graphene 玻璃的生长率显著地增加了,和在象与那些相比的生长质量和在常规煤气的流动 CVD 技术的一致性的改进。这些高质量的 graphene 眼镜与以前报导的那些相比以许多更高的 defogging 速度和更高的稳定性展出了优秀 defogging 表演。graphene 蓝宝石玻璃被发现是为种制服和极端光滑的铝氮化物的理想的底层没有缓冲区层的乏味的免职前的薄电影。介绍范围流动 CVD 途径为 graphene 玻璃的大量生产提供一条简单、便宜的线路,它被相信支持各种各样的 graphene 眼镜的实际应用。 | Zhaolong Chen Baolu Guan Xu-dong Chen Qing Zeng Li Lin Ruoyu Wang Manish Kr. Priydarshi Jingyu Sun Zhepeng Zhang Tongbo Wei Jinmin LI Yanfeng Zhang Yingying Zhang Zhongfan Liu | 2016 | Nano Research2016，9，10： | 5 |
| 4 | Space-confined growth of monolayer ReSe2 under a graphene layer on Au foils显示文摘Vertical heterostructures based on two-dimensional(2D)materials have attracted widespread interest for their numerous applications in electronic and optoelectronic devices.Herein,we report the direct construct!on of an abnormal graphene/ReSe2 stack on Au foils by a two-step chemical vapor deposition(CVD)strategy.During the second growth stage,mono layer ReSe2 is found to prefere ntially evolve at the irUerface between the first-grown graphene layer and the Au substrate.The unusual stacking behavior is unraveled by in-situ'cutting open'the upper graphene from the defects to expose the lower ReSe2 using scanning tunneling microscopy(STM).From combination of these results with density functional theory calculations,the domain boundaries and edge sites of graphene are proposed to be adsorption sites for Re and Se precursors,further facilitating the growth of ReSe2 at the van der Waals gap of graphene/Au.This work hereby offers an intriguing strategy for obtaining vertical 2D heterostructures featured with an ultra-clean interface and a designed stacking geometry. | Chunyu Xie Shaolong Jiang Xiaolong Zou Yuanwei Sun Liyun Zhao Min Hong Shulin Chen Yahuan Huan Jianping Shi Xiebo Zhou Zhepeng Zhang Pengfei Yang Yuping Shi Porun Liu Qing Zhang Peng Gao Yanfeng Zhang | 2019 | Nano Research2019，12，1： | 4 |
| 5 | Inducible expression of Wnt7b promotes bone formation in aged mice and enhances fracture healing显示文摘There remain unmet clinical needs for safe and effective bone anabolic therapies to treat aging-related osteoporosis and to improve fracture healing in cases of nonunion or delayed union. Wnt signaling has emerged as a promising target pathway for developing novel bone anabolic drugs. Although neutralizing antibodies against the Wnt antagonist sclerostin have been tested,Wnt ligands themselves have not been fully explored as a potential therapy. Previous work has demonstrated Wnt7b as an endogenous ligand upregulated during osteoblast differentiation, and that Wnt7b overexpression potently stimulates bone accrual in the mouse. The earlier studies however did not address whether Wnt7b could promote bone formation when specifically applied to aged or fractured bones. Here we have developed a doxycycline-inducible strategy where Wnt7b is temporally induced in the bones of aged mice or during fracture healing. We report that forced expression of Wnt7b for 1 month starting at 15 months of age greatly stimulated trabecular and endosteal bone formation, resulting in a marked increase in bone mass. We further tested the effect of Wnt7b on bone healing in a murine closed femur fracture model. Induced expression of Wnt7b at the onset of fracture did not affect the initial cartilage formation but promoted mineralization of the subsequent bone callus. Thus, targeted delivery of Wnt7b to aged bones or fracture sites may be explored as a potential therapy. | Deye Song Guangxu He Fangfang Song Zhepeng Wang Xiaochen Liu Lele Liao Jiangdong Ni Matthew JSilva Fanxin Long | 2020 | Bone Research2020，8，1： | 3 |
| 6 | Quasi-freestanding, striped WS2 monolayer with an invariable band gap on Au(001)显示文摘 | Min Hong Xiebo Zhou Jianping Shi Yue Qi Zhepeng Zhang Qiyi Fang Yaguang Guo Yajuan Sun Zhongfan Liu Yuanchang Li Qian Wang Yanfeng Zhang | 2017 | Nano Research2017，10，11： | 0 |
| 7 | Batch synthesis of transfer-free graphene with wafer-scale uniformity显示文摘Scalable synthesis of transfer-free graphene over insulators offers exciting opportunity for next-generation electronics and optoelectronics.However,rational design of synthetic protocols to harvest wafer-scale production of directly grown graphene still remains a daunting challenge.Herein we explore a batch synthesis of large-area graphene with wafer-scale uniformity by virtue of direct chemical vapor deposition(CVD)on quartz.Such a controllable CVD approach allows to synthesize 30 pieces of 4-inch graphene wafers in one batch,affording a low fluctuation of optical and electrical properties.Computational fluid dynamics simulations reveal the mechanism of uniform growth,indicating thermal field and confined flow field play leading roles in attaining the batch uniformity.The resulting wafer-scale graphene enables the direct utilization as key components in optical elements.Our method is applicable to other types of insulating substrates(e.g.,sapphire,SiO2/Si,Si3N4),which may open a new avenue for direct manufacture of graphene wafers in an economic fashion. | Bei Jiang Qiyue Zhao Zhepeng Zhang Bingzhi Liu Jingyuan Shan Liang Zhao Mark H.Rümmeli Xuan Gao Yanfeng Zhang Tongjun Yu Jingyu Sun Zhongfan Liu | 2020 | Nano Research2020，13，6： | 0 |
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