【摘 要】
：
Low photothermal conversion efficiency restricts the antibacterial application of photothermal materials.In this work,two-dimensional carbon nanosheets (2D C) were prepared and decorated with Cu nanopar-ticles (2D C/Cu) by using a simple soluble salt temp
【机 构】
：
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional
论文部分内容阅读
Low photothermal conversion efficiency restricts the antibacterial application of photothermal materials.In this work,two-dimensional carbon nanosheets (2D C) were prepared and decorated with Cu nanopar-ticles (2D C/Cu) by using a simple soluble salt template method combined with ultrasonic exfoliation.The photothermal conversion efficiency of 2D C/Cu system can be optimized by changing the content of Cu nanoparticles,where the 2D C/Cu2 showed the best photothermal conversion efficiency (η) of 65.05％ under 808 nm near-infrared light irradiation.In addition,the photothermal performance can affect the release behavior of Cu ions.This superior photothermal property combined with released Cu ions can endow this 2D hybrid material with highly efficient antibacterial efficacy of 99.97 ％ ± 0.01％,99.96 ％ ±0.01％,99.97 ％ ± 0.01％ against Escherichia coli,Staphylococcus aureus,and methicillin-resistant Staphylo-coccus aureus,respectively,because of the synergetic effect of photothermy and ion release.In addition,this 2D hybrid system exhibited good cytocompatibility.Hence,this study provides a novel strategy to enhance the photothermal performance of 2D materials and thus will be beneficial for development of antibiotics-free antibacterial materials with safe and highly efficient bactericidal activity.
其他文献
朗肯理论局限于求解墙背铅直且光滑,墙后填土位移达到极限状态的土压力,因而开展倾斜粗糙墙背的非极限主动土压力的理论研究具有重大意义.将墙后黏性填土滑裂体分为弹性区和塑性区两部分,并基于非极限状态下的虚功原理,建立了能量守恒方程,推导了张拉裂缝深度及潜在滑裂面的解析式.在此基础上,考虑了土拱效应,并通过摩尔应力圆,得到了水平应力、竖向应力的表达式,由水平层分析法建立受力平衡方程,推求了倾斜挡墙黏性填土非极限主动土压力分布、合力大小、合力作用点深度的理论表达式.当满足朗肯假设时,朗肯裂缝深度、滑裂面倾角、合力值
模型试验中冲刷地形测绘装备相对落后,致使桥墩周围局部冲刷瞬时地形数据无法实时获取,冲刷动态发展过程及机理的模型试验研究工作难以开展.研制了一种模型桥墩局部冲刷瞬时地形数据等值线自动绘制装备,并利用室内水工模型试验优化了各组成的性能指标,量化了绘制装备的设计参数,分析了监测系统在模型应用中的测绘精度及在工程原型中的适用性.模型试验研究表明,该装备结构简单,操作方便,加工制作成本较低,精度及灵敏性较高,能够快速获取动态过程中局部冲刷瞬时地形等值线,适用于局部冲刷发展影响流场特性研究中的水下地形快速测绘,也可按
Effect of sulfate-reducing bacteria on the corrosion behaviors of API-X80 pipeline steel has been studied in crevices under simulated disbonded coatings in red soil solution.The results show that there are amounts of SRB in the crevice under the simulated
为探究考虑扰动效应时透水管桩桩周土的固结特性,利用有限元分析软件,建立了考虑扰动效应的饱和软黏土中透水管桩地基土固结三维模型,然后采用模型退化及试验实测数据对比两种方式进行有限元模拟准确性的验证.最后,在考虑扰动效应影响下,对不同开孔几何参数下桩周土超静孔压的消散情况进行了讨论.结果表明:模型退化验证及对比实测数据均与数值模拟结果基本保持一致,很好地验证了数值模拟的准确性;扰动程度系数α的变化仅对超静孔压前期的消散速率影响显著,并造成一定程度的孔压消散差,随着孔压消散的进行这一差距逐渐减小.扰动范围s的增
Both silicon and tin are promising anodes for new generation lithium ion batteries due to high lithium storage capacities (theoretically 4200 mA h g-1 and 992 mA h g-1,respectively).However,their large volumetric expansions (both are above 300 ％) usually
P-type semiconductivity has been observed in solid solution series (SrTiO3)1-x(CaCr0.5Nb0.5O3)x (0.0 ≤x ≤ 0.15),which all adopt cubic symmetry and own intense absorption in the visible light region.These solid solutions are superior H2 evolution photocata
1.IntroductionrnHigh strength steels continue to be developed for automotive applications to increase safety and reduce lightweight by down-gauging[1,2].In addition,reducing density is another solution for the lightweight of automotive components[3,4].Alu
The microstructure and room-temperature tensile deformation behavior of the cast CrFeCoNiAl0.7 high-entropy alloy (HEA) were studied in details.The cast HEA consisted of a dual-phase structure of 77.3 vol.％ face-centered-cubic (FCC) phase plus 22.7 vol.％
The top-down method was used to fabricate the TiNi1+xSn half-Heusler alloy.Several knotty problems have been solved using the top-down method,including the generation of impurity phases,the visi-ble discrepancy in the grain size of the TiNi2Sn second phas
The influence of different precipitate-dislocation interactions,namely dislocation shearing and bypass-ing mechanisms,on PLC bands and the resultant surface roughness in AlMgScZr alloy was investigated.Three-dimensional surface roughness was quantitativel