Superamphiphilic Silicon Wafer Surfaces and Applications for Uniform Polymer Film Fabrication

Silicon wafers have been widely used in the semiconductor industry for many decades. Over the past decades, with the development of organic optoelectronic materials, silicon-based organic–inorganic hybrid devices have received more and more interest in fundamental and applied research. To obtain uniform organic films for hybrid devices, superamphiphilic surfaces, on which both water and oil can spread completely, show great advantages. Herein, we prepared superamphiphilic silicon wafer surfaces with contact angles (CAs) near 0° for both water and typical organic liquids. Interestingly, lateral force mode (LFM) atomic force microscopy (AFM) images indicate that the superamphiphilicity is induced by alternating hydrophilic and hydrophobic nanodomains. By making use of these superamphiphilic silicon wafer surfaces, uniform polypyrrole (PPy) films were generated in both water and cyclopentanone, providing a versatile and effective way for the integration of organic optoelectronic materials with inorganic microelectronic devices.     

Mussel‐Inspired Two‐Dimensional Freestanding Alkyl‐Polydopamine Janus Nanosheets

Mussel‐inspired two‐dimensional freestanding, alkyl‐polydopamine (alkyl‐PDA) Janus nanosheets, with a well‐controlled nanometer thickness and a lateral size of up to micrometers, have been developed. A self‐assembled octadecylamine (ODA) bilayer is used as the reactive template for the dopamine polymerization, resulting in the formation of well‐defined nanosheets. The alkyl‐PDA nanosheets show an amphiphilic nature with hydrophilic PDA and hydrophobic alkyl chains on opposing sides. The nanosheets can be used to functionalize many substrates and is dependent on the configuration of surface of the nanosheets. The nanosheets are quite stable, as the morphology is preserved after carbonization at 900 °C. Post‐modification of the nanosheets can be easily achieved because of the reactive nature of PDA. This work will provide a new strategic approach for fabricating polymeric Janus nanosheets, which can find applications for surface modifications, catalyst supports, and guided self‐assembly.     

两亲荧光探针与氨基酸的荧光光谱

用自行设计合成的两亲荧光探针探讨了与色氨酸,酪氨酸两种体系在不同条件下的荧光性质.实验结果表明:在pH=7.3的缓冲溶液体系中相对荧光强度最大;得出两亲荧光探针与色氨酸、两亲荧光探针与酪氨酸发生相互作用且体系稳定;为研究和了解两亲荧光探针与生物大分子作用的化学本质提後供了一定的依据.     

Dendr.PE-PAA在水溶液中自聚集的NMR研究

用1H NMR自扩散系数,核弛豫和二维NOESY谱研究了新合成苄醚树枝体与丙烯酸杂化嵌段共聚物在水溶液中生成胶团的动态行为.体系中苄醚树枝体与丙烯酸杂化嵌段共聚物的各1H核的自旋-晶格弛豫时间（T1）、自旋-自旋弛豫时间（T2）、自扩散系数和二维NOESY中的交叉峰证明苄醚树枝体与丙烯酸杂化嵌段共聚物在水溶液中形成自聚集,且与不同浓度下聚集体有差别.