The strategy we utilized involved the preparation of polymer films from poly(tert-butyl acrylate)... more The strategy we utilized involved the preparation of polymer films from poly(tert-butyl acrylate)-block-poly(2-cinnamoylethyl methacrylate) with the PCEMA block photo-cross-linkable and the tert-butyl groups of the PtBA block cleavable by hydrolysis. The samples we used ...
The concept of a responsive nanoporous thin-film gel membranes whose pores could be tuned to a de... more The concept of a responsive nanoporous thin-film gel membranes whose pores could be tuned to a desired size by a specific "molecular signal" and whose pore geometry becomes "memorized" by the gel is reported. The ∼100 nm thick membranes were prepared by dip-coating from a solution mixture of a random copolymer comprising responsive and photo-cross-linkable units and monodisperse latex nanoparticles used as a sacrificial colloidal template. After stabilization of the films by photo-cross-linking the latex template was removed, yielding nanoporous structures with a narrow pore size distribution and a high porosity. The thin-film membranes could be transferred onto porous supports to serve as tunable size-selective barriers in various colloids separation applications. The pore dimensions and hence the membrane's colloidal-particle-size cutoff were reversibly regulated by swelling-shrinking of the polymer network with a specially selected low-molar-mass compound....
Russian-Chinese Symposium on Laser Physics and Laser Technologies and Academic Symposium on Optoelectronics Technology, 2010
We report the fabrication of a novel high-power VCSEL with reticular electrode in this letter. Th... more We report the fabrication of a novel high-power VCSEL with reticular electrode in this letter. The analysis shows that the reticular electrodes can improve the homogeneity in the injected current and heighten VCSEL optical output power. The high-power reticular electrode VCSELs with 500μm aperture have been made and tested. Testing results show the slope efficiency of 0.75mW/mA, output power of
4-vinylpyridine, respectively. The aggregates of the triblock copolymers with different compositi... more 4-vinylpyridine, respectively. The aggregates of the triblock copolymers with different compositions and chain architec-tures in water also were investigated, and the results are presented. Reducing the P4VP block length and keeping the PS block constant favored the formation of rod ...
2010 Academic Symposium on Optoelectronics and Microelectronics Technology and 10th Chinese-Russian Symposium on Laser Physics and Laser TechnologyOptoelectronics Technology (ASOT), 2010
Cu(2+)/amylose assemblies of various sizes were prepared through the Cu(2+) ion induced-assembly ... more Cu(2+)/amylose assemblies of various sizes were prepared through the Cu(2+) ion induced-assembly of amylose. These assembly structures were characterized via transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), dynamic light scattering (DLS), (1)H NMR analysis, fluorescence spectroscopy (FL) and UV-vis absorption spectroscopy (UV-vis). The results from these characterizations revealed the existence of a complexation effect and/or a bridging effect between the hydroxyl groups of amylose and Cu(2+) ions, and that the formation of the hydrophobic domains promoted the formation of Cu(2+)/amylose assemblies. The use of other metal ions to induce the formation of spherical, flower- and wire-like amylose assemblies was investigated as well. A preliminary investigation on the ability of amylose to capture various metal ions was also performed, and the results of this work demonstrated that amylose could bind quantitatively metal ions that were at low concentration...
... Full Paper. Polystyrene-block-poly(2-cinnamoylethyl methacrylate) NanofibersPreparation, Cha... more ... Full Paper. Polystyrene-block-poly(2-cinnamoylethyl methacrylate) NanofibersPreparation, Characterization, and Liquid Crystalline Properties. Guojun Liu 1 ,; Jianfu Ding 1 ,; Lijie Qiao 1 ,; Andrew Guo 1 ,; Boris P. Dymov 2 ,; James T. Gleeson 3 ,; T. Hashimoto 4 ,; K. Saijo 4. ...
Atom transfer radical polymerization (ATRP) was used to prepare a new series of ABA triblock copo... more Atom transfer radical polymerization (ATRP) was used to prepare a new series of ABA triblock copolymers that are photoactive thermoplastic elastomers. The samples synthesized have the same rubbery midblock of poly(n-butyl acrylate) (PnBA) but differ in the degree of ...
The strategy we utilized involved the preparation of polymer films from poly(tert-butyl acrylate)... more The strategy we utilized involved the preparation of polymer films from poly(tert-butyl acrylate)-block-poly(2-cinnamoylethyl methacrylate) with the PCEMA block photo-cross-linkable and the tert-butyl groups of the PtBA block cleavable by hydrolysis. The samples we used ...
The concept of a responsive nanoporous thin-film gel membranes whose pores could be tuned to a de... more The concept of a responsive nanoporous thin-film gel membranes whose pores could be tuned to a desired size by a specific "molecular signal" and whose pore geometry becomes "memorized" by the gel is reported. The ∼100 nm thick membranes were prepared by dip-coating from a solution mixture of a random copolymer comprising responsive and photo-cross-linkable units and monodisperse latex nanoparticles used as a sacrificial colloidal template. After stabilization of the films by photo-cross-linking the latex template was removed, yielding nanoporous structures with a narrow pore size distribution and a high porosity. The thin-film membranes could be transferred onto porous supports to serve as tunable size-selective barriers in various colloids separation applications. The pore dimensions and hence the membrane's colloidal-particle-size cutoff were reversibly regulated by swelling-shrinking of the polymer network with a specially selected low-molar-mass compound....
Russian-Chinese Symposium on Laser Physics and Laser Technologies and Academic Symposium on Optoelectronics Technology, 2010
We report the fabrication of a novel high-power VCSEL with reticular electrode in this letter. Th... more We report the fabrication of a novel high-power VCSEL with reticular electrode in this letter. The analysis shows that the reticular electrodes can improve the homogeneity in the injected current and heighten VCSEL optical output power. The high-power reticular electrode VCSELs with 500μm aperture have been made and tested. Testing results show the slope efficiency of 0.75mW/mA, output power of
4-vinylpyridine, respectively. The aggregates of the triblock copolymers with different compositi... more 4-vinylpyridine, respectively. The aggregates of the triblock copolymers with different compositions and chain architec-tures in water also were investigated, and the results are presented. Reducing the P4VP block length and keeping the PS block constant favored the formation of rod ...
2010 Academic Symposium on Optoelectronics and Microelectronics Technology and 10th Chinese-Russian Symposium on Laser Physics and Laser TechnologyOptoelectronics Technology (ASOT), 2010
Cu(2+)/amylose assemblies of various sizes were prepared through the Cu(2+) ion induced-assembly ... more Cu(2+)/amylose assemblies of various sizes were prepared through the Cu(2+) ion induced-assembly of amylose. These assembly structures were characterized via transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), dynamic light scattering (DLS), (1)H NMR analysis, fluorescence spectroscopy (FL) and UV-vis absorption spectroscopy (UV-vis). The results from these characterizations revealed the existence of a complexation effect and/or a bridging effect between the hydroxyl groups of amylose and Cu(2+) ions, and that the formation of the hydrophobic domains promoted the formation of Cu(2+)/amylose assemblies. The use of other metal ions to induce the formation of spherical, flower- and wire-like amylose assemblies was investigated as well. A preliminary investigation on the ability of amylose to capture various metal ions was also performed, and the results of this work demonstrated that amylose could bind quantitatively metal ions that were at low concentration...
... Full Paper. Polystyrene-block-poly(2-cinnamoylethyl methacrylate) NanofibersPreparation, Cha... more ... Full Paper. Polystyrene-block-poly(2-cinnamoylethyl methacrylate) NanofibersPreparation, Characterization, and Liquid Crystalline Properties. Guojun Liu 1 ,; Jianfu Ding 1 ,; Lijie Qiao 1 ,; Andrew Guo 1 ,; Boris P. Dymov 2 ,; James T. Gleeson 3 ,; T. Hashimoto 4 ,; K. Saijo 4. ...
Atom transfer radical polymerization (ATRP) was used to prepare a new series of ABA triblock copo... more Atom transfer radical polymerization (ATRP) was used to prepare a new series of ABA triblock copolymers that are photoactive thermoplastic elastomers. The samples synthesized have the same rubbery midblock of poly(n-butyl acrylate) (PnBA) but differ in the degree of ...
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