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Start Over Author "Chunyi Zhi" Journal journal of the american chemical society
6 results on '"Chunyi Zhi"'

1. Isolation of individual boron nitride nanotubes via peptide wrapping

Author

Zhenghong Gao, Chunyi Zhi, Bando, Yoshio, Golberg, Dmitri, and Serizawa, Takeshi

Subjects
Boron nitride -- Chemical properties, Boron nitride -- Electric properties, Infrared spectroscopy -- Usage, Nanotubes -- Structure, Nanotubes -- Chemical properties, Peptides -- Chemical properties, Chemistry
Abstract

The isolation of individual boron nitride nanotubes (BNNTs) in aqueous phases is achieved from raw materials based on the combination of peptide wrapping with a sonication procedure. The modulation of the BNNT band gap with peptide wrapping has potential applications of the peptide/BNNT complexes to various nanotechnologies.

Published
2010

2. Aqueous noncovalent functionalization and controlled near-surface carbon doping of multiwalled boron nitride nanotubes

Author

Wenlong Wang, Chunyi Zhi, Wangyang Fu, Enge Wang, and Golberg, Dmitri

Subjects
Boron nitride -- Chemical properties, Boron nitride -- Electric properties, Chemical vapor deposition -- Usage, Nanotubes -- Chemical properties, Nanotubes -- Electric properties, Semiconductor doping -- Analysis, Chemistry
Abstract

The mechanisms involved in the aqueous noncovalent functionalization and controlled near-surface carbon doping of multiwalled boron nitride nanotubes (BNNTs) are studied. The doping of these BNNTs with carbon is shown to highly affect the electronic and mechanical properties of the system.

Published
2008

3. Immobilization of proteins on boron nitride nanotubes

Author

Chunyi Zhi, Bando, Yoshio, Golberg, Dmitri, and Chengchun Tang

Subjects
Proteins -- Chemical properties, Boron nitride -- Chemical properties, Nanotubes -- Chemical properties, Chemistry
Abstract

The effect of immobilization of proteins on boron nitride nanotubes (BNNTs) is studied and the immobilization is thought to be due to carboxylation of BNNT-bound amino groups or prominent tube/protein electrostatic interactions. Noncovalently functionalized BNNTs are used for the most effective immobilization.

Published
2005

4. Perfectly dissolved boron nitride nanotubes due to polymer wrapping

Author

Chunyi Zhi, Bando, Yoshio, Chengchun Tang, Rongguo Xie, Sekiguchi, Takashi, and Golberg, Dmitri

Subjects
Boron nitride -- Chemical properties, Boron nitride -- Structure, Nanotubes -- Structure, Transmission electron microscopes -- Usage, Chemistry
Abstract

Highly pure boron nitride nanotubes (BNNTs) are synthesized at high yield by a carbon-free chemical vapor deposition method and are functionalized by wrapping them with a conjugated polymer, poly[m-phenylenevinylene-co-(2,5-dioctoxy-p-phenylenevinylene)] (PmPV). These polymer-wrapped soluble BNNTs have numerous applications in composites and optical devices due to good dispersion and unique luminescence properties.

Published
2005

5. Perfectly dissolved boron nitride nanotubes due to polymer wrapping

Author

Rongguo Xie, Yoshio Bando, Chunyi Zhi, Chengchun Tang, Dmitri Golberg, and Takashi Sekiguchi

Subjects
chemistry.chemical_classification, Nanotube, Band gap, Chemistry, Composite number, Cathodoluminescence, General Chemistry, Polymer, Biochemistry, Catalysis, chemistry.chemical_compound, Colloid and Surface Chemistry, Chemical engineering, Transmission electron microscopy, Boron nitride, Surface modification, Organic chemistry
Abstract

We report for the first time that boron nitride nanotubes (BNNTs) may be dissolved in organic solvents by wrapping them with a polymer. Transmission electron microscopy and cathodoluminescence studies indicate the strong pi-pi interactions between BNNTs and the polymer. A band gap ranging from 5.2 to 5.5 eV was documented for the BNNTs independent of their geometrical characteristics by using ultraviolet-visible absorption experiments on composite films and thin BNNT films prepared from solutions.

Published
2005

6. Isolation of Individual Boron Nitride Nanotubes via Peptide Wrapping

Author

Chunyi Zhi, Yoshio Bando, Takeshi Serizawa, Zhenghong Gao, and Dmitri Golberg

Subjects
Boron Compounds, chemistry.chemical_classification, Nanotubes, Aqueous solution, Chemistry, Band gap, Sonication, Infrared spectroscopy, Nanotechnology, Peptide, General Chemistry, Biochemistry, Fluorescence, Catalysis, chemistry.chemical_compound, Colloid and Surface Chemistry, Chemical engineering, Boron nitride, Absorption (chemistry), Oligopeptides
Abstract

The isolation of individual boron nitride nanotubes (BNNTs) in aqueous phases has been achieved for the first time from raw materials based on the combination of peptide wrapping with a sonication procedure. Atomic force microscopic observations revealed the representative height and length of individual BNNTs. Fluorescence and infrared absorption spectra suggested the strong pi-pi interactions between BNNTs and the peptide. The absorption maxima of BNNTs were significantly blue-shifted from 200 nm for the original BNNTs to 193 nm. The modulation of the BNNT band gap with peptide wrapping promises potential applications of the peptide/BNNT complexes to various nanotechnologies.

Published
2010

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