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Zhang J, Chen S, Qin B, Zhang D, Guo P, He Q. Preparation of hyperbranched polymeric ionic liquids for epoxy resin with simultaneous improvement of strength and toughness. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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2
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Ghosh S, Dutta M, Ray K, Fujita D, Bandyopadhyay A. A simultaneous one pot synthesis of two fractal structures via swapping two fractal reaction kinetic states. Phys Chem Chem Phys 2017; 18:14772-5. [PMID: 27166589 DOI: 10.1039/c6cp00447d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We introduce a new class of fractal reaction kinetics wherein two or more distinct fractal structures are synthesized as parts of a singular cascade reaction in a single chemical beaker. Two examples: sphere ↔ spiral & triangle ↔ square fractals, grow 10(6) orders from a single dendrimer (8 nm) to the visible scale.
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Affiliation(s)
- Subrata Ghosh
- National Institute for Materials Science, Advanced Key Technologies Division, 1-2-1 Sengen, Tsukuba, Ibaraki-3050047, Japan. and Mass General Institute for Neurodegenerative Disease, Mass General Hospital Harvard Medical School, Boston, Massachusetts-02129, USA and Amity University, Jaipur, Rajasthan, India
| | - Mrinal Dutta
- International center for Materials and Nano-architectronics (MANA), 1-1 Namiki, Ibaraki 3050044, Japan
| | - Kanad Ray
- Amity University, Jaipur, Rajasthan, India
| | - Daisuke Fujita
- National Institute for Materials Science, Advanced Key Technologies Division, 1-2-1 Sengen, Tsukuba, Ibaraki-3050047, Japan.
| | - Anirban Bandyopadhyay
- National Institute for Materials Science, Advanced Key Technologies Division, 1-2-1 Sengen, Tsukuba, Ibaraki-3050047, Japan.
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3
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Wang X, Jin C, Han Q, Jiang Y, Zeng F, Ma Z, Wang B. Synthesis, Self-Assembly, and Host-Guest Response of Naphthalic Anhydride-Ended Hyperbranched Polyesters. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201500452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaoxia Wang
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Can Jin
- Jiangsu Provincial Key Laboratory of Biomass Energy and Materials; National Engineering Laboratory for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products; CAF; Nanjing 210042 China
| | - Qiaorong Han
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Yuliang Jiang
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Fanyang Zeng
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Zhenye Ma
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Bingxiang Wang
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
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Lee CD, Hara SA, Yu L, Kuo JTW, Kim BJ, Hoang T, Pikov V, Meng E. Matrigel coatings for Parylene sheath neural probes. J Biomed Mater Res B Appl Biomater 2015; 104:357-68. [PMID: 25809504 DOI: 10.1002/jbm.b.33390] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 12/26/2014] [Accepted: 01/29/2015] [Indexed: 01/15/2023]
Abstract
The biologically derived hydrogel Matrigel (MG) was used to coat a Parylene-based sheath intracortical electrode to act as a mechanical and biological buffer as well as a matrix for delivering bioactive molecules to modulate the cellular response and improve recording quality. MG was loaded with dexamethasone to reduce the immune response together with nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) to maintain neuronal density and encourage neuronal ingrowth toward electrodes within the sheath. Coating the Parylene sheath electrode with the loaded MG significantly improved the signal-to-noise ratio for neural events recorded from the motor cortex in rat for more than 3 months. Electron microscopy showed even coverage of both the Parylene substrate and the platinum recording electrodes. Electrochemical impedance spectroscopy (EIS) of coated electrodes in 1× phosphate-buffered saline demonstrated low impedance required for recording neural signals. This result was confirmed by in vivo EIS data, showing significantly decreased impedance during the first week of recording. Dexamethasone, NGF, and BDNF loaded into MG were released within 1 day in 1× phosphate-buffered saline. Although previous studies showed that MG loaded with either the immunosuppressant or the neurotrophic factor cocktail provided modest improvement in recording quality in a 1-month in vivo study, the combination of these bioactive molecules did not improve the signal quality over coating probes with only MG in a 3-month in vivo study. The MG coating may further improve recording quality by optimizing the in vivo release profile for the bioactive molecules.
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Affiliation(s)
- Curtis D Lee
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111
| | - Seth A Hara
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111
| | - Lawrence Yu
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111
| | - Jonathan T W Kuo
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111
| | - Brian J Kim
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111
| | - Tuan Hoang
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111
| | - Victor Pikov
- Neural Engineering Program, Huntington Medical Research Institutes, Pasadena, California, 91105-3104
| | - Ellis Meng
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, 90089-1111.,Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California, 90089-2560
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Zhang D, Xu Z, Li J, Chen S, Cheng J, Zhang A, Chen S, Miao M. Self-assembly of amido-ended hyperbranched polyester films with a highly ordered dendritic structure. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16375-16383. [PMID: 25148598 DOI: 10.1021/am504705c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Self-assemblies fabricated from dendrimers and amphiphilic polymers have demonstrated remarkable performances and a wide range of applications. Direct self-assembly of hyperbranched polymers into highly ordered macrostructures with heat-resistance remains a big challenge due to the weak amphiphilicity of the polymers. Here, we report the self-assembly of amphiphilic amido-ended hyperbranched polyester (HTDA-2) into millimeter-size dendritic films using combined hydrogen bond interaction and solvent induction. The self-assembly process and mechanism have been studied. Hydrogen bond interaction between amido-ended groups assists the aggregation of inner and outer chains of the HTDA-2, resulting in phase separation and micelle formation. Some micelles attach to and grow on the glass substrate like seedlings. Other micelles move to the seedlings and connect with their branches via solvent induction and hydrogen bond interaction, leading to the fabrication of highly ordered crystalline dendritic films that show high heat-resistance. HTDA-2 can further self-assemble into sheet crystals on the dendritic films.
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Affiliation(s)
- Daohong Zhang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities , Wuhan, Hubei 430074, China
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Xu Z, Zhang D, Li J, Chen S, Li T, Zhang J, Zhang A, Chen S. Effects of the carboxyl-ended hyperbranched polyester/platinum complex molecular weight on hydrosilylation activity and self-assembled morphology. J Appl Polym Sci 2014. [DOI: 10.1002/app.41416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zhicai Xu
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
| | - Daohong Zhang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
| | - Junna Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
| | - Sufang Chen
- Key Laboratory for Green Chemical Process of Ministry of Education; Wuhan Institute of Technology; Wuhan Hubei 430073 China
| | - Tingcheng Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
| | - Junheng Zhang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
| | - Aiqing Zhang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
| | - Shenghui Chen
- College of Chemistry and Materials Science; South-Central University for Nationalities; Wuhan Hubei Province 430074 China
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Abstract
Here, we present an easy and stable one-step procedure to fabricate self-assembled nanofibers from modified chitosan.
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Affiliation(s)
- P. Suvannasara
- Program of Petrochemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok, Thailand
| | - N. Praphairaksit
- Department of Biology
- Faculty of Science
- Srinakarinwirot University
- Bangkok, Thailand
| | - N. Muangsin
- Bioorganic Chemistry and Biomaterials Research group
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok, Thailand
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Li J, Zhang D, Li S, Xu Z, Chen S, Li T, Zhang J, Chen S, Zhang A. 2D Self-Assembly of an Amido-Ended Hydrophilic Hyperbranched Polyester by Copper Ion Induction. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300274] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Zhang D, Li J, Wang J, Chen S, Zhou J, Li T, Zhang J, Zhang A, Liu C. 2D Self-assembly of an amido-ended hyperbranched polyester induced by platinum ion coordination effect. RSC Adv 2013. [DOI: 10.1039/c3ra42057d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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