1
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Sun L, Han H, Liu Z, Fu Z, Hua C, Ma E, Guo J, Liu J, Li L, Fang B, Guo X. Immobilization of Gold Nanoparticles in Spherical Polymer Brushes Observed by Small-Angle X-ray Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1869-1876. [PMID: 35080891 DOI: 10.1021/acs.langmuir.1c03081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanosized gold nanoparticles (AuNPs) are of great interest in areas such as catalysts or imaging but are easy to aggregate due to high surface activity. To stabilize AuNPs, two approaches were employed to immobilize AuNPs in spherical polymer brushes (SPBs), namely, the in situ preparation of AuNPs within the brush layer of SPBs and external addition of preprepared citrate-capped AuNPs. The distribution and stability of AuNPs in SPBs were studied by small-angle X-ray scattering (SAXS). SAXS results demonstrated that the in situ-prepared AuNPs were mainly located on the inner layer and their amount decreased from inside to outside. In the case of external addition of preprepared AuNPs, the cationic SPB showed obvious immobilization, while almost no AuNPs were immobilized in the anionic SPB. The stable immobilization of the AuNPs in SPBs was the result of multiple interactions including complexation and electrostatic interaction. SAXS was validated to be a distinctive and powerful characterization method to provide theoretical guidance for the stable immobilization of AuNPs.
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Affiliation(s)
- Liang Sun
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, 832000 Shihezi, Xinjiang, P. R. China
| | - Haoya Han
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
- BASF Advanced Chemicals Co., Ltd., 200137 Shanghai, P. R. China
| | - Zhiyong Liu
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, 832000 Shihezi, Xinjiang, P. R. China
| | - Zhinan Fu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Chen Hua
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Enguang Ma
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, 832000 Shihezi, Xinjiang, P. R. China
| | - Jiangtao Guo
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Jichang Liu
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, 832000 Shihezi, Xinjiang, P. R. China
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Li Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Bo Fang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Xuhong Guo
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, 832000 Shihezi, Xinjiang, P. R. China
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
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2
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Wang W, Xu W, Song W, Yang B, Li L, Guo X, Wu L, Liu H. Novel Mo-V Oxide Catalysts with Nanospheres as Templates for the Selective Oxidation of Acrolein to Acrylic Acid. Catal Letters 2021. [DOI: 10.1007/s10562-020-03457-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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3
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Exploring the Interfacial Phase and π-π Stacking in Aligned Carbon Nanotube/Polyimide Nanocomposites. NANOMATERIALS 2020; 10:nano10061158. [PMID: 32545565 PMCID: PMC7353158 DOI: 10.3390/nano10061158] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/22/2020] [Accepted: 06/01/2020] [Indexed: 11/16/2022]
Abstract
To characterize the interfacial microstructure and interaction at a nanoscale has a significant meaning for the interface improvement of the nanocomposites. In this study, the interfacial microstructure and features of aligned multiwalled carbon nanotube (MWNT) and conjugated polymer polyimide (PI) with three molecular structures were investigated using small-angle X-ray scattering (SAXS), wide-angle x-ray diffraction (WAXD), and fluorescence emission spectroscopy. It was found that aligned MWNT/PI nanocomposites had a nonideal two-phase system with the interfaces belonging to long period stacking ordered structure. Attributed to the π-π stacking effect, MWNT/BTDA-MPD presented the most regular arrangement verified by fractal dimension. By adopting a one-dimension correlation function, each phase dimension in aligned MWNT/PI nanocomposites was calculated and verified by high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The π-π stacking was demonstrated to be an important interaction between MWNT and PI via WAXD and fluorescence emission spectroscopy, and it was influenced by the linkage bond between benzene rings in PIs. This work is of significance to reveal the interfacial features between conjugated polymer and carbon nanotubes (CNTs), which is favorable for the interface design of CNT-based high performance nanocomposites.
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Wang Y, Li L, Wang Y, Yang Q, Ye Z, Hua C, Tian Y, Klitzing RV, Guo X. Interaction among Spherical Polyelectrolyte Brushes in Concentrated Aqueous Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3104-3110. [PMID: 32176504 DOI: 10.1021/acs.langmuir.9b03180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Interaction among concentrated spherical polyelectrolyte brushes (SPB) dispersions in water was systematically investigated by means of small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS), and rheological methods. SPB consist of a core of polystyrene (PS) and a poly(acrylic acid) (PAA) brush shell. The "polyelectrolyte peak" appeared in SAXS spectra and was observed in WAXS curves for the first time. The size of the polyelectrolyte peak and the rheological properties of SPB were found to be strongly effected by SPB concentration, pH, and ionic strength. Combined with SAXS, WAXS, and rheological results, it is confirmed that the polyelectrolyte peak is originated from local ordered structures of polyelectrolyte chains bridged by counterions in the overlapping area among SPB driven by electrostatic interactions.
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Affiliation(s)
- Yunwei Wang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Li Li
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Yiming Wang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Qingshong Yang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Zhishuang Ye
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Chen Hua
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Yuchuan Tian
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Regine von Klitzing
- Technical University Darmstadt, Department of Physics, Soft Matter at Interfaces, Darmstadt 64287, Germany
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
- Engineering Research Center of Xinjiang Bingtuan of Materials Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang 832000, P.R. China
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5
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Ye Z, Li L, Zhao F, Tian Y, Wang Y, Yang Q, Dai L, Guo X. Enrichment and distribution of counterions in spherical polyelectrolyte brushes probed by SAXS. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/polb.24828] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Zhishuang Ye
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Li Li
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Fang Zhao
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Yuchuan Tian
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Yunwei Wang
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Qingsong Yang
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Liheng Dai
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Xuhong Guo
- State Key Laboratory of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang BingtuanShihezi University Xinjiang 832000 China
- International Joint Research Center of Green Energy Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
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6
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Tian Y, Kelarakis A, Li L, Zhao F, Wang Y, Wang W, Yang Q, Ye Z, Guo X. Facile Fluorescence "Turn on" Sensing of Lead Ions in Water via Carbon Nanodots Immobilized in Spherical Polyelectrolyte Brushes. Front Chem 2018; 6:470. [PMID: 30356747 PMCID: PMC6189401 DOI: 10.3389/fchem.2018.00470] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 09/18/2018] [Indexed: 02/04/2023] Open
Abstract
Heavy metal detection has become very important for the protection of water resource. In this work, a novel controllable probe is presented for the sensitive detection of Pb2+ in aqueous solutions. The probe was synthesized via the immobilization of surface functionalized carbon dots (named as CAEA-Hs) into the shell of the spherical polyelectrolyte brushes (SPB). The fluorescence of CAEA-H was firstly "turned off" via electrostatic interaction induced quenching. Based on the aggregation induced emission enhancement (AIEE), the fluorescence of the immobilized CAEA-H could be specifically turned on via the aggregation of the SPB particles. This fluorescence "turn on" sensor could selectively detect Pb2+ among five different metal ions with a relatively wide detecting range (0-1.67 mM) and good linear relationship (R 2 = 0.9958). Moreover, the aggregating behavior and nano-structure of CAEA-H loaded SPB have been systematically analyzed via small angle X-ray scattering, turbidity titration, and Zeta-potential measurement. Based on a series of control experiments, we finally gain an insight into the sensing mechanism of this novel sensing probe. This contributed a proof of concept demonstration that sensitive and selective chemical detection can be achieved via a C-dot/SPB synergistic platform.
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Affiliation(s)
- Yuchuan Tian
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Antonios Kelarakis
- School of Physical Sciences and Computing, University of Central Lancashire, Preston, United Kingdom
| | - Li Li
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Fang Zhao
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Yunwei Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | | | - Qingsong Yang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhishuang Ye
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
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7
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Zhang T, Li L, Ye Z, Yang Q, Tian Y, Guo X. Preparation and characterization of Ag–Pd bimetallic nano-catalysts in thermosensitive microgel nano-reactor. RSC Adv 2018; 8:18252-18259. [PMID: 35541123 PMCID: PMC9080592 DOI: 10.1039/c8ra02563k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 05/08/2018] [Indexed: 11/23/2022] Open
Abstract
Thermosensitive microgels consisting of a solid core of polystyrene and a shell of cross-linked poly(N-isopropylacrylamide) (PNIPA) were synthesized as nano-reactors, in which Ag–Pd bimetallic nanoparticles were prepared through simultaneous in situ reduction reaction. The spatial distribution of metallic nanoparticles in the microgels was analyzed by small angle X-ray scattering (SAXS) and the results indicated that metal nanoparticles were mainly located in the inner layer of microgels. The catalytic activity of Ag–Pd bimetallic nanoparticles was investigated using the reduction of p-nitrophenol to p-aminophenol by NaBH4 as model reaction. The data demonstrated that Ag–Pd bimetallic nanoparticles showed enhanced catalytic activity compared to each monometallic nanoparticle alone and their catalytic activity was controllable by temperature due to the volume transition of PNIPA microgels. Thermosensitive microgels with PS core and cross-linked PNIPA shell were synthesized as nano-reactor to prepare Ag–Pd bimetallic nanoparticles.![]()
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Affiliation(s)
- Tao Zhang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Li Li
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Zhishuang Ye
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Qingsong Yang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Yuchuan Tian
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan
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8
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Han H, Li L, Wang W, Tian Y, Wang Y, Wang J, von Klitzing R, Guo X. Core-Shell-Corona Silica Hybrid Nanoparticles Templated by Spherical Polyelectrolyte Brushes: A Study by Small Angle X-ray Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9857-9865. [PMID: 28836791 DOI: 10.1021/acs.langmuir.7b02239] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Core-shell-corona silica/polymer hybrid nanoparticles with narrow size distribution were prepared in the template of spherical polyelectrolyte brushes (SPB) which consist of a solid polystyrene (PS) core densely grafted with linear poly(acrylic acid) (PAA) chains. The microstructure of obtained hybrid nanoparticles was studied by small-angle X-ray scattering (SAXS) and in combination with dynamic light scattering (DLS) and transmission electron microscopy (TEM). The generation of silica shell within the brush is confirmed by the significant increase of the electron density in the shell, and the silica shell showed a unique inner-loose-outer-dense structure, whose thickness is pH sensitive but is insensitive to ionic strength as revealed by fitting SAXS data. After dissolving the PS core, hollow silica nanoparticles were obtained and determined by SAXS, which should be ideal carriers for pH-triggered drug delivery. SAXS is confirmed to be a powerful method to characterize the core-shell-corona silica/polymer hybrid and hollow silica nanoparticles.
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Affiliation(s)
- Haoya Han
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
- Department of Physics, Technical University Darmstadt , Alarich-Weiss-Strasse 10, 64287 Darmstadt, Germany
| | - Li Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Weihua Wang
- Sinopec Shanghai Research Institute of Petrochemical Technology , 201208 Shanghai, P.R. China
| | - Yuchuan Tian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Yunwei Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Junyou Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Regine von Klitzing
- Department of Physics, Technical University Darmstadt , Alarich-Weiss-Strasse 10, 64287 Darmstadt, Germany
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University , 832000 Xinjiang, P.R. China
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9
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Wang W, Li L, Henzler K, Lu Y, Wang J, Han H, Tian Y, Wang Y, Zhou Z, Lotze G, Narayanan T, Ballauff M, Guo X. Protein Immobilization onto Cationic Spherical Polyelectrolyte Brushes Studied by Small Angle X-ray Scattering. Biomacromolecules 2017; 18:1574-1581. [PMID: 28398743 DOI: 10.1021/acs.biomac.7b00164] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The immobilization of bovine serum albumins (BSA) onto cationic spherical polyelectrolyte brushes (SPB) consisting of a solid polystyrene (PS) core and a densely grafted poly(2-aminoethyl methacrylate hydrochloride) (PAEMH) shell was studied by small-angle X-ray scattering (SAXS). The observed dynamics of adsorption of BSA onto SPB by time-resolved SAXS can be divided into two stages. In the first stage (tens of milliseconds), the added proteins as in-between bridge instantaneously caused the aggregation of SPB. Then BSA penetrated into the brush layer driven by electrostatic attractions, and reached equilibrium in the second stage (tens of seconds). The amount of BSA immobilized onto brush layer reached the maximum when pH was increased to about 6.1 and BSA concentration to 10 g/L. The cationic SPB were confirmed to provide stronger adsorption capacity for BSA compared to anionic ones.
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Affiliation(s)
- Weihua Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China.,Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Li Li
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Katja Henzler
- Paul Scherer Institute , Laboratory for Synchrotron Radiation and Femtochemistry, 5232 Villigen PSI, Switzerland
| | - Yan Lu
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany.,Institut für Phzsik, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Junyou Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Haoya Han
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Yuchuan Tian
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Yunwei Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Zhiming Zhou
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Gudrun Lotze
- European Synchrotron Radiation Facility , F-38043, Grenoble, France
| | | | - Matthias Ballauff
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany.,Institut für Phzsik, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China.,Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University , Xinjiang 832000, People's Republic of China
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10
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Guryanov I, Polo F, Ubyvovk EV, Korzhikova-Vlakh E, Tennikova T, Rad AT, Nieh MP, Maran F. Polylysine-grafted Au 144 nanoclusters: birth and growth of a healthy surface-plasmon-resonance-like band. Chem Sci 2017; 8:3228-3238. [PMID: 28507699 PMCID: PMC5414598 DOI: 10.1039/c6sc05187a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 02/01/2017] [Indexed: 12/13/2022] Open
Abstract
Poly(amino acid)-coated gold nanoparticles hold promise in biomedical applications, particularly because they combine the unique physicochemical properties of the gold core, excellent biocompatibility, and easy functionalization of the poly(amino acid)-capping shell. Here we report a novel method for the preparation of robust hybrid core-shell nanosystems consisting of a Au144 cluster and a densely grafted polylysine layer. Linear polylysine chains were grown by direct N-carboxyanhydride (NCA) polymerization onto ligands capping the gold nanocluster. The density of the polylysine chains and the thickness of the polymer layer strongly depend on the amount and concentration of the NCA monomer and the initiator. The optical spectra of the so-obtained core-shell nanosystems show a strong surface plasmon resonance (SPR)-like band at 531 nm. In fact, despite maintenance of the gold cluster size and the absence of interparticle aggregation, the polylysine-capped clusters behave as if they have a diameter nearly 4 times larger. To the best of our knowledge, this is the first observation of the growth of a fully developed, very stable SPR-like band for a gold nanocluster of such dimensions. The robust polylysine protective shell makes the nanoparticles very stable under conditions of chemical etching, in the presence of glutathione, and at different pH values, without gold core deshielding or alteration of the SPR-like band. This polymerization method can conceivably be extended to prepare core-shell nanosystems based on other mono- or co-poly(amino acids).
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Affiliation(s)
- Ivan Guryanov
- Institute of Chemistry , St. Petersburg State University , 26 Universitetskij Pr., 198504 Petrodvorets , St. Petersburg , Russia .
| | - Federico Polo
- Department of Chemistry , University of Padova , Via Marzolo 1 , 35131 Padova , Italy .
| | - Evgeniy V Ubyvovk
- Department of Physics , St. Petersburg State University , 3 Ulyanovskaya, 198504 Petrodvorets , St. Petersburg , Russia
| | - Evgenia Korzhikova-Vlakh
- Institute of Chemistry , St. Petersburg State University , 26 Universitetskij Pr., 198504 Petrodvorets , St. Petersburg , Russia .
| | - Tatiana Tennikova
- Institute of Chemistry , St. Petersburg State University , 26 Universitetskij Pr., 198504 Petrodvorets , St. Petersburg , Russia .
| | - Armin T Rad
- Department of Biomedical Engineering , University of Connecticut , 260 Glenbrook Road , Storrs , Connecticut 06269 , USA
| | - Mu-Ping Nieh
- Polymer Program , Institute of Materials Science , University of Connecticut , 97 N. Eagleville Rd , Storrs , Connecticut 06269 , USA
- Department of Chemical & Biomolecular Engineering , University of Connecticut , 191 Auditorium Rd , Storrs , Connecticut 06269 , USA
| | - Flavio Maran
- Department of Chemistry , University of Padova , Via Marzolo 1 , 35131 Padova , Italy .
- Department of Chemistry , University of Connecticut , 55 North Eagleville Road , Storrs , 06269 Connecticut , USA
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11
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Han H, Li L, Tian Y, Wang Y, Ye Z, Yang Q, Wang Y, von Klitzing R, Guo X. Spherical polyelectrolyte nanogels as templates to prepare hollow silica nanocarriers: observation by small angle X-ray scattering and TEM. RSC Adv 2017. [DOI: 10.1039/c7ra10011f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Hollow silica nanoparticles were prepared through generating a silica layer in spherical polyelectrolyte nanogels, which consisted of a solid core of polystyrene and a shell of crosslinked poly(acrylic acid), followed by removing the core via solvent dissolution.
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Affiliation(s)
- Haoya Han
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Li Li
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Yuchuan Tian
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Yunwei Wang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Zhishuang Ye
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Qingsong Yang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
| | - Yiming Wang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
- Department of Chemical Engineering
| | | | - Xuhong Guo
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- 200237 Shanghai
- P. R. China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan
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12
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Tian Y, Li L, Han H, Wang W, Wang Y, Ye Z, Guo X. Modification of Spherical Polyelectrolyte Brushes by Layer-by-Layer Self-Assembly as Observed by Small Angle X-ray Scattering. Polymers (Basel) 2016; 8:E145. [PMID: 30979238 PMCID: PMC6432364 DOI: 10.3390/polym8040145] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 03/14/2016] [Accepted: 04/08/2016] [Indexed: 11/17/2022] Open
Abstract
Multilayer modified spherical polyelectrolyte brushes were prepared through alternate deposition of positively charged poly(allylamine hydrochloride) (PAH) and negatively charged poly-l-aspartic acid (PAsp) onto negatively charged spherical poly(acrylic acid) (PAA) brushes (SPBs) on a poly(styrene) core. The charge reversal determined by the zeta potential indicated the success of layer-by-layer (LBL) deposition. The change of the structure during the construction of multilayer modified SPBs was observed by small-angle X-ray scattering (SAXS). SAXS results indicated that some PAH chains were able to penetrate into the PAA brush for the PAA-PAH double-layer modified SPBs whereas part of the PAH moved towards the outer layer when the PAsp layer was loaded to form a PAA-PAH-PAsp triple-layer system. The multilayer modified SPBs were stable upon changing the pH (5 to 9) and ionic strength (1 to 100 mM). The triple-layer modified SPBs were more tolerated to high pH (even at 11) compared to the double-layer ones. SAXS is proved to be a powerful tool for studying the inner structure of multilayer modified SPBs, which can establish guidelines for the a range of potential applications of multilayer modified SPBs.
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Affiliation(s)
- Yuchuan Tian
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Li Li
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Haoya Han
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Weihua Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Yunwei Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Zhishuang Ye
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
- Engineering Research Center of Xinjiang Bingtuan of Materials Chemical Engineering, Shihezi University, Xinjiang 832000, China.
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13
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Zhang R, Hou X, Cang Y, Yu Z, Shen Z, Zhou Z, Guo X, Wang J, Zhu X. Efficiently amplified ultrasonic degradation of spherical polyelectrolyte brushes by a magnetic field. RSC Adv 2016. [DOI: 10.1039/c5ra27405b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work describes a facile and green method about the ultrasonic degradation of polymer chains amplified by magnetic field.
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Affiliation(s)
- Rui Zhang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xiaoyan Hou
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yu Cang
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhenchuan Yu
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zheqi Shen
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Zhiming Zhou
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Junwei Wang
- Collaborative Innovation Center for Petrochemical New Materials
- Anqing
- China
| | - Xuedong Zhu
- State Key Laboratory of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
- Collaborative Innovation Center for Petrochemical New Materials
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14
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Wang W, Chu F, Li L, Han H, Tian Y, Wang Y, Yuan Z, Zhou Z, Guo X. Interactions among spherical poly(acrylic acid) brushes: Observation by rheology and small angle X-ray scattering. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Weihua Wang
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Fangfang Chu
- Soft Matter and Functional Materials; Helmholtz-Zentrum Berlin Für Materialien Und Energie; Hahn-Meitner-Platz 1 Berlin 14109 Germany
| | - Li Li
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Haoya Han
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Yuchuan Tian
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Yunwei Wang
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Zhenyu Yuan
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Zhiming Zhou
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
- Engineering Research Center of Xinjiang Bingtuan of Materials-Oriented Chemical Engineering; Shihezi University; Xinjiang 832000 People's Republic of China
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15
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Tunable immobilization of protein in anionic spherical polyelectrolyte brushes as observed by small-angle X-ray scattering. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3684-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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