The adsorption dynamics of a model protein （the human insulin） onto graphene surfaces with different sizes was investigated by molecular dynamics simulations. During the adsorption, it has different effect on the st...The adsorption dynamics of a model protein （the human insulin） onto graphene surfaces with different sizes was investigated by molecular dynamics simulations. During the adsorption, it has different effect on the stability of the model protein in the fixed and non-fixed graphene systems. The tertiary structure of the protein was destroyed or partially destroyed, and graphene surfaces shows the selective protection for some α-helices in non-fixed Systems but not in fixed systems by reason of the flexibility of graphene. As indicated by the interaction energy curve and trajectory animation, the conformation and orientation selection of the protein were induced by the properties and the texture of graphene surfaces. The knowledge of protein adsorption on graphene surfaces would be helpful to better understand stability of protein on graphene surfaces and facilitate potential applications of graphene in biotechnology.展开更多
We report the formation of gold ramified aggregates after deposition of Au on an ionic liquid surface by thermal evaporation method at room temperature.It is observed that the aggregates are composed of both granules ...We report the formation of gold ramified aggregates after deposition of Au on an ionic liquid surface by thermal evaporation method at room temperature.It is observed that the aggregates are composed of both granules and nanocrystals with hexagonal or triangular appearances.The most probable size of the nanocrystals is much larger than that of the granules and it increases with the nominal deposition thickness.The formation mechanism of the granules,nanocrystals and aggregates is presented.展开更多
We report a catalyst-free growth of Cu nanocrystals on ionic liquid surfaces by thermal evaporation method at room temperature.After deposition of Cu on ionic liquid surfaces,ramified Cu aggregates form.It is found th...We report a catalyst-free growth of Cu nanocrystals on ionic liquid surfaces by thermal evaporation method at room temperature.After deposition of Cu on ionic liquid surfaces,ramified Cu aggregates form.It is found that the aggregates are composed of both granules and nanocrystals with triangular or hexagonal appearances.The sizes of the nanocrystals are in the range of tens to hundreds of nanometers and increase with the nominal deposition thickness.The growth mechanism of the Cu aggregates and nanocrystals is presented.展开更多
基金V. ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.60533050 and No.J0830413） and the Zhejiang Provincial Natural Science Foundation of China （No.R407042）.
文摘The adsorption dynamics of a model protein （the human insulin） onto graphene surfaces with different sizes was investigated by molecular dynamics simulations. During the adsorption, it has different effect on the stability of the model protein in the fixed and non-fixed graphene systems. The tertiary structure of the protein was destroyed or partially destroyed, and graphene surfaces shows the selective protection for some α-helices in non-fixed Systems but not in fixed systems by reason of the flexibility of graphene. As indicated by the interaction energy curve and trajectory animation, the conformation and orientation selection of the protein were induced by the properties and the texture of graphene surfaces. The knowledge of protein adsorption on graphene surfaces would be helpful to better understand stability of protein on graphene surfaces and facilitate potential applications of graphene in biotechnology.
基金the National Natural Science Foundation of China under Grant No.11374082。
文摘We report the formation of gold ramified aggregates after deposition of Au on an ionic liquid surface by thermal evaporation method at room temperature.It is observed that the aggregates are composed of both granules and nanocrystals with hexagonal or triangular appearances.The most probable size of the nanocrystals is much larger than that of the granules and it increases with the nominal deposition thickness.The formation mechanism of the granules,nanocrystals and aggregates is presented.
基金National Natural Science Foundation of China(Grant No.11374082).
文摘We report a catalyst-free growth of Cu nanocrystals on ionic liquid surfaces by thermal evaporation method at room temperature.After deposition of Cu on ionic liquid surfaces,ramified Cu aggregates form.It is found that the aggregates are composed of both granules and nanocrystals with triangular or hexagonal appearances.The sizes of the nanocrystals are in the range of tens to hundreds of nanometers and increase with the nominal deposition thickness.The growth mechanism of the Cu aggregates and nanocrystals is presented.
