Connectivity of PS-b-PEO templated spherical pores in titanium oxide films

文献情報

出版日 2011-06-10

DOI 10.1039/C1CP21060B

インパクトファクター 3.676

著者

Debraj Chandra, Tatsuki Ohji, Kazumi Kato, Tatsuo Kimura

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要旨

Titania films having relatively uniform spherical pores were successfully fabricated using polystyrene-block-poly(ethylene oxide) (PSn-b-PEOm) diblock copolymers. Depending on the molecular weight of PSn-b-PEOm, the spherical pores were varied from large mesopores (n = 40 000, m = 53 000; ∼40 nm) to macropores (n = 58 600, m = 71 000; ∼60 nm, n = 100 000, m = 150 000; ∼100 nm) in diameter. It was confirmed that the porous structures were thermally stable with crystallization of the titania frameworks. Interconnectivity between the spherical pores was reliant on the micellar arrangement of hydrophobic PS cores, while the amount of isolated pores was increased in the films prepared using low molecular weight PSn-b-PEOm. The presence of such isolated pores was confirmed on the basis of adsorption experiments by using a globular hemoprotein cytochrome c (ca. 3.1 nm). Highly interconnected spherical pores, which were preferentially fabricated using high molecular weight PSn-b-PEOm, were quite helpful for smooth diffusion–adsorption of bulky proteins inside the porous films.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.