Size-selective molecular transport through silica colloidal nanopores.
نویسندگان
چکیده
Diffusion rate of dye-labelled PAMAM dendrimers through free-standing silica colloidal crystals was studied as a function of the dendrimer generation and nanopore size to determine the transport selectivity.
منابع مشابه
Ion exclusion and electrokinetic effects resulting from electro-osmotic flow of salt solutions in charged silica nanopores.
Silica nanopores are the focus of significant scientific interest due to their potential in a wide variety of applications including desalination membranes. In this paper, the results of extensive all-atom molecular dynamics simulations of the electro-osmotic flow of 0.5 M monovalent (NaCl) and divalent (CaCl(2)) ionic solutions through cylindrical charged silica nanopores are presented. The si...
متن کاملStructure-dependent water transport across nanopores of carbon nanotubes: toward selective gating upon temperature regulation.
Determining water structure in nanopores and its influence on water transport behaviour is of great importance for understanding and regulating the transport across nanopores. Here we report an ultrafast-slow flow transition phenomenon for water transport across nanopores of carbon nanotubes owing to the change in water structure in nanopores induced by temperature. By performing extensive mole...
متن کاملSelective ion passage through functionalized graphene nanopores.
Biological ionic channels play a key role in many cellular transport phenomena. In their complex cores, these proteins contain precisely arranged arrays of charged amino acids that can efficiently recognize and guide the passing ions. For industrial applications, much simpler nonbiological ionic and molecular channels can be made from zeolites, carbon, silica, and other materials. These channel...
متن کاملToward Coordinated Colloids: Site-Selective Growth of Titania on Patchy Silica Particles
Rational synthesis of coordinated spherical colloids is reported by site-selective growth of secondary hemispherical patches on primary spherical particles with quasi-defined coordination numbers and positions. We clarify the importance of mass transport phenomena on the site-specific secondary nucleation/growth in nanoparticulate colloidal systems. By comparing ultrasonic and conventional agit...
متن کاملPreparation and Characterization of Colloidal Silica in Alkaline and Constant Range of pH
In this study, alkaline colloidal silica was prepared by titration of an alkaline solution such as sodium silicate with silicic acid in constant range of pH .This constant range of pH was achieved by using concentrated soduim silicate solutions as pH adjusting solutions during titration.The sodium silicate solutions having a variety of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemical communications
دوره 47 1 شماره
صفحات -
تاریخ انتشار 2011