1
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Yang Y, Wang P, Cheng H, Cheng Y, Zhao Z, Xu Y, Shen Y, Zhu M. A multi-responsive Au NCs@PMLE/Ca 2+ antitumor hydrogel formed in situ on the interior/surface of tumors for PT imaging-guided synergistic PTT/O 2-enhanced PDT effects. NANOSCALE 2022; 14:7372-7386. [PMID: 35535969 DOI: 10.1039/d2nr00953f] [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
At present, although phototherapy and related imaging have proven to be promising cancer diagnosis and treatment strategies, the free diffusion of photosensitizers into normal tissues can cause side effects, and the efficiency of photodynamic therapy (PDT) can also be limited by the tumor hypoxic microenvironment. Herein, we designed and prepared a new cancer nanoplatform containing Au nanoclusters (NCs)@Premna microphylla leaf extract (PMLE) with both responsiveness to near-infrared (NIR) laser irradiation and tumor microenvironment (TME) by facile redox and coordination reactions. Then, the Au NCs@PMLE/Ca2+ hydrogel was constructed in situ inside and on the surface of tumors for locoregional antitumor activity under 808 nm laser irradiation. The Au NCs@PMLE nanoplatform showed distinguished performance in killing cancer cells and alleviating tumor hypoxia by enhancing the temperature of the tumor sites and producing reactive oxygen species (ROS) under NIR irradiation as well as catalyzing hydrogen peroxide (H2O2) decomposition in TME for oxygen (O2) generation via catalase in PMLE. The ultra-small size of about 3 nm of the Au NCs in this nanoplatform was obtained using the biological molecules present in PMLE as reductants and coordination agents simultaneously, which also demonstrated the outstanding capability of photothermal (PT) imaging and photothermal therapy (PTT) towards tumors. Furthermore, the Au NCs@PMLE/Ca2+ hydrogel formed in situ through natural PMLE and intrinsic Ca2+ in TME could not only improve the biocompatibility of the nanoplatform and stability of Au NCs but was also highly concentrated around the tumor thus enhancing the therapeutic efficiency and inhibiting its migration to normal tissues, decreasing the side effects. The results of the experiments confirmed that the Au NCs@PMLE/Ca2+ hydrogel possessed PT imaging-guided NIR laser/TME-responsive synergetic cancer PTT/O2-enhanced PDT and remarkable locoregional antitumor effect for cancer therapy. This work may open a new versatile route for multi-responsive localized cancer therapeutic nanoplatforms.
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Affiliation(s)
- Yongmei Yang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
- School of Chemistry and Chemical Engineering, Huangshan University, Huangshan 245041, P. R. China
| | - Peisan Wang
- School of Biomedical Engineering, Anhui Medical University, Hefei Anhui 230032, P. R. China
| | - Hanlong Cheng
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
| | - Yinkai Cheng
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
| | - Zhou Zhao
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
| | - Yahan Xu
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
| | - Yuhua Shen
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
| | - Manzhou Zhu
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China.
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2
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Han Y, Langer M, Medved’ M, Otyepka M, Král P. Stretch‐Healable Molecular Nanofibers. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yanxiao Han
- Department of Chemistry University of Illinois at Chicago Chicago IL 60607 USA
| | - Michal Langer
- Department of Chemistry University of Illinois at Chicago Chicago IL 60607 USA
- Regional Centre of Advanced Technologies and Materials Department of Physical Chemistry Faculty of Science Palacký University Olomouc tř. 17. listopadu 1192/12 771 46 Olomouc Czech Republic
| | - Miroslav Medved’
- Regional Centre of Advanced Technologies and Materials Department of Physical Chemistry Faculty of Science Palacký University Olomouc tř. 17. listopadu 1192/12 771 46 Olomouc Czech Republic
| | - Michal Otyepka
- Regional Centre of Advanced Technologies and Materials Department of Physical Chemistry Faculty of Science Palacký University Olomouc tř. 17. listopadu 1192/12 771 46 Olomouc Czech Republic
| | - Petr Král
- Department of Chemistry University of Illinois at Chicago Chicago IL 60607 USA
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3
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Liang J, Wei W, Yao H, Shi K, Liu H. A biocomputing platform with electrochemical and fluorescent signal outputs based on multi-sensitive copolymer film electrodes with entrapped Au nanoclusters and tetraphenylethene and electrocatalysis of NADH. Phys Chem Chem Phys 2019; 21:24572-24583. [PMID: 31663551 DOI: 10.1039/c9cp03687c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this work, poly(N,N'-dimethylaminoethylmethacrylate-co-N-isopropylacrylamide) copolymer films were polymerized on the surface of Au electrodes with a facile one-step method, and Au nanoclusters (AuNCs) and tetraphenylethene (TPE) were synchronously embedded in the films, designated as P(DMA-co-NIPA)/AuNCs/TPE. Ferrocene dicarboxylic acid (FDA), an electroactive probe in solution displayed inverse pH- and SO42--sensitive on-off cyclic voltammetric (CV) behaviors at the film electrodes. The electrocatalytic oxidation of nicotinamide adenine dinucleotide (NADH) mediated by FDA in solution could substantially amplify the CV response difference between the on and off states. Moreover, the two fluorescence emission (FL) signals from the TPE constituent at 450 nm and AuNCs component at 660 nm in the films also demonstrated SO42-- and pH-sensitive behaviors. Based on the aforementioned results, a 4-input/9-output biomolecular logic circuit was constructed with pH, Na2SO4, FDA and NADH as the inputs, and the CV signals and the FL responses at 450 and 660 nm at different levels as the outputs. Additionally, some functional non-Boolean devices were elaborately designed on an identical platform, including a 1-to-2 decoder, a 2-to-1 encoder, a 1-to-2 demultiplexer and different types of keypad locks. This work combines copolymer films, bioelectrocatalysis, and fluorescence together so that more complicated biocomputing systems could be established. This work may pave a new way to develop advanced and sophisticated biocomputing logic circuits and functional devices in the future.
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Affiliation(s)
- Jiying Liang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China.
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Kastilani R, Wong R, Pozzo LD. Efficient Electrosteric Assembly of Nanoparticle Heterodimers and Linear Heteroassemblies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:826-836. [PMID: 28772077 DOI: 10.1021/acs.langmuir.7b01323] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bottom-up approaches to the synthesis of nanostructures are of particular interest because they offer several advantages over the traditional top-down approaches. In this work, we present a new method to self-assemble nanoparticles into controlled heteroaggregates. The technique relies on carefully balancing attractive electrostatic forces with repulsive steric hindrance that is provided by surface-grafted polyethylene glycol (PEG). Two different-sized gold nanoparticles (GNPs) were used as a model system: 13 nm GNPs were functionalized with PEG-thiol and mercapto dodecanoic acid, while 7 nm GNPs were functionalized with PEG-thiol and (11- Mercaptoundecyl)trimethylammonium bromide. When mixed together, these oppositely charged particles self-assemble into stable colloidal structures (i.e., nanoclusters) whose structure depends strongly on the surface concentration of PEG. Smaller structures are obtained as the PEG surface concentration increases because steric hindrance dominates and prevents uncontrolled aggregation. In particular, under the right conditions, we were able to selectively synthesize heterodimers (which are effectively Janus particles) and linear heteroassemblies. This method is scalable, and it provides a step forward in bottom-up synthesis of nanomaterials.
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Affiliation(s)
- Ryan Kastilani
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98195, United States
| | - Ryan Wong
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98195, United States
| | - Lilo D Pozzo
- Department of Chemical Engineering, University of Washington , Seattle, Washington 98195, United States
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5
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Kwon NK, Lee TK, Kwak SK, Kim SY. Aggregation-Driven Controllable Plasmonic Transition of Silica-Coated Gold Nanoparticles with Temperature-Dependent Polymer-Nanoparticle Interactions for Potential Applications in Optoelectronic Devices. ACS APPLIED MATERIALS & INTERFACES 2017; 9:39688-39698. [PMID: 29053247 DOI: 10.1021/acsami.7b13123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Localized surface plasmon resonance (LSPR) effect relies on the shape, size, and dispersion state of metal nanoparticles and can potentially be employed in many applications such as chemical/biological sensor, optoelectronics, and photocatalyst. While complicated synthetic approaches changing shape and size of nanoparticles can control the intrinsic LSPR effect, here we show that controlling interparticle interactions with silica-coated gold nanoparticles (Au@SiO2 NPs) is a powerful approach, permitting wide range of optical bandwidth of gold nanoparticles with great stability. The interparticle interactions of Au@SiO2 NPs are controlled through concentration-, temperature-, and time-dependent polymer-induced interactions. The polymer-induced interactions modulate the state of particle dispersion, resulting an effective plasmonic shift by more than 200 nm. We further explore the microstructure of particle aggregation and explain mechanisms of plasmonic shift based on the results of small-angle X-ray scattering (SAXS) and discrete dipole approximation (DDA) calculation. We show that an effective control of LSPR behavior is now available through trapped aggregation of Au@SiO2 NPs with temperature variation. We anticipate that the suggested strategy can be employed in many practical applications such as optical bioimaging and optoelectronic devices.
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Affiliation(s)
- Na Kyung Kwon
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919, Republic of Korea
| | - Tae Kyung Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919, Republic of Korea
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919, Republic of Korea
| | - So Youn Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919, Republic of Korea
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Moaseri E, Stover RJ, Changalvaie B, Cepeda AJ, Truskett TM, Sokolov KV, Johnston KP. Control of Primary Particle Spacing in Gold Nanoparticle Clusters for Both High NIR Extinction and Full Reversibility. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3413-3426. [PMID: 28277669 DOI: 10.1021/acs.langmuir.6b04453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Reversible NIR-active nanoparticle clusters with controlled size from 20 to 100 nm were assembled from 5 nm gold nanoparticles (Au NP), with either citrate (CIT) or various binary ligands on the surface, by tuning the electrostatic repulsion and the hydrogen bonding via pH. The nanoclusters were bound together by vdW forces between the cores and the hydrogen bonds between the surface ligands and dissociated to primary nanoparticles over a period of 20 days at pH 5 and at pH 7. When high levels of citrate ligands were used on the primary particle surfaces, the large particle spacings in the nanoclusters led to only modest NIR extinction. However, a NIR extinction (E1000/525) ratio of up to ∼0.4 was obtained for nanoclusters with binary ligand mixtures composed of citrate and either cysteine (CYS), glutathione (GSH), or thioctic acid zwitterion (TAZ) while maintaining full reversibility to primary particles. The optimum ligand ratio for both an E1000/525 of ∼0.4 and full reversibility decreased with increasing length of the secondary ligand (1.5/1 for CYS/CIT, 0.75/1 for GSH/CIT, and 0.5/1 for TAZ/CIT) because a longer secondary ligand maintains a sufficient interparticle spacing required for dissociation more effectively. Interestingly, the zeta potential and the first-order rate constant for nanocluster dissociation were similar for all three systems at the optimum ligand ratios. After incubation in 10 mM GSH solution (intracellular concentration), only the TAZ/CIT primary nanoparticles were resistant to protein opsonization in 100% fetal bovine serum, as the bidentate binding and zwitterion tips of TAZ resisted GSH exchange and protein opsonization, respectively.
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Affiliation(s)
| | | | | | | | | | - Konstantin V Sokolov
- Department of Imaging Physics, MD Anderson Cancer Center , Houston, Texas 77030, United States
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7
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Villareal OD, Rodriguez RA, Yu L, Wambo TO. Molecular dynamics simulations on the effect of size and shape on the interactions between negative Au 18(SR) 14, Au 102(SR) 44 and Au 144(SR) 60 nanoparticles in physiological saline. Colloids Surf A Physicochem Eng Asp 2016; 503:70-78. [PMID: 27330249 PMCID: PMC4911198 DOI: 10.1016/j.colsurfa.2016.05.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Molecular dynamics simulations employing all-atom force fields have become a reliable way to study binding interactions quantitatively for a wide range of systems. In this work, we employ two recently developed methods for the calculation of dissociation constants KD between gold nanoparticles (AuNPs) of different sizes in a near-physiological environment through the potential of mean force (PMF) formalism: the method of geometrical restraints developed by Woo et al. and formalized by Gumbart et al. and the method of hybrid Steered Molecular Dynamics (hSMD). Obtaining identical results (within the margin of error) from both approaches on the negatively charged Au18(SR)14 NP, functionalized by the negatively charged 4-mercapto-benzoate (pMBA) ligand, we draw parallels between their energetic and entropic interactions. By applying the hSMD method on Au102(SR)44 and Au144(SR)60, both of them near-spherical in shape and functionalized by pMBA, we study the effects of size and shape on the binding interactions. Au18 binds weakly with KD = 13mM as a result of two opposing effects: its large surface curvature hindering the formation of salt bridges, and its large ligand density on preferential orientations favoring their formation. On the other hand, Au102 binds more strongly with KD = 30μM and Au144 binds the strongest with KD = 3.2nM.
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Affiliation(s)
- Oscar D. Villareal
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, U.S.A
| | - Roberto A. Rodriguez
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, U.S.A
| | - Lili Yu
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, U.S.A
- Department of Laboratory Medicine, Yancheng Vocational Institute of Health Sciences, Jiangsu Yancheng 224006, P.R.C
| | - Thierry O. Wambo
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, U.S.A
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8
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Stover RJ, Moaseri E, Gourisankar SP, Iqbal M, Rahbar NK, Changalvaie B, Truskett TM, Johnston KP. Formation of Small Gold Nanoparticle Chains with High NIR Extinction through Bridging with Calcium Ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1127-38. [PMID: 26735290 DOI: 10.1021/acs.langmuir.5b03639] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The self-assembly of citrate-capped Au nanoparticles (5 nm) resulted in branched nanochains by adding CaCl2 versus spherical nanoclusters for NaCl. These assemblies were formed between 1 s to 30 min by tuning the electrostatic repulsion and the interparticle bridging attraction between the cations and citrate ligands as a function of electrolyte concentration. For dilute Ca(2+), strong interparticle bridging favored particle attachment at chain ends. This resulted in the formation of small, branched chains with lengths as short as 20 nm, due to the large Debye length for the diffuse counterions. Furthermore, the bridging produced very small interparticle spacings and sintering, as evident in high-resolution TEM despite the low temperature. This morphology produced a large red shift in the surface plasmon resonance, as characterized by a broad extinction peak with NIR absorption out to 1000 nm, which is unusual for such small particles. Whereas these properties were seen for primary particles with partial citrate monolayers, the degrees of sintering and NIR extinction were small in the case of citrate multilayers. The ability to design the size and shape of nanoparticle clusters as well as the interparticle spacing by tuning bridging and electrostatic interactions may be expected to be quite general and of broad applicability in materials synthesis.
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Affiliation(s)
- Robert J Stover
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Ehsan Moaseri
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Sai P Gourisankar
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Muhammad Iqbal
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Negin K Rahbar
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Behzad Changalvaie
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Thomas M Truskett
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Keith P Johnston
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
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Song J, Kim J, Hwang S, Jeon M, Jeong S, Kim C, Kim S. “Smart” gold nanoparticles for photoacoustic imaging: an imaging contrast agent responsive to the cancer microenvironment and signal amplification via pH-induced aggregation. Chem Commun (Camb) 2016; 52:8287-90. [DOI: 10.1039/c6cc03100e] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
pH-Responsive “smart” gold nanoparticles were demonstrated as a new photoacoustic imaging agent that can selectively respond to the cancer microenvironment and show the amplified signal in vivo.
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Affiliation(s)
- Jaejung Song
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang University of Science and Technology (POSTECH)
- Pohang
- South Korea
| | - Jeesu Kim
- Department of Electrical Engineering and Creative IT Engineering
- POSTECH
- Pohang
- South Korea
| | - Sekyu Hwang
- Department of Chemistry
- POSTECH
- Pohang
- South Korea
| | - Mansik Jeon
- School of Electronics Engineering College of IT Engineering
- Kyungpook National University
- Buk-gu
- South Korea
| | | | - Chulhong Kim
- Department of Electrical Engineering and Creative IT Engineering
- POSTECH
- Pohang
- South Korea
| | - Sungjee Kim
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang University of Science and Technology (POSTECH)
- Pohang
- South Korea
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10
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He Z, Sun Y, Cao J, Duan Y. Degradation behavior and biosafety studies of the mPEG–PLGA–PLL copolymer. Phys Chem Chem Phys 2016; 18:11986-99. [DOI: 10.1039/c6cp00767h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In a previous study, a novel biodegradable multiblock copolymer, monomethoxy (poly-ethylene glycol)–poly(d,l-lactide-co-glycolide)–poly(l-lysine) (PEAL), was developed as a new drug carrier material.
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Affiliation(s)
- Zelai He
- State Key Laboratory of Oncogenes and Related Genes
- Shanghai Cancer Institute
- Renji Hospital
- School of Medicine
- Shanghai Jiao Tong University
| | - Ying Sun
- State Key Laboratory of Oncogenes and Related Genes
- Shanghai Cancer Institute
- Renji Hospital
- School of Medicine
- Shanghai Jiao Tong University
| | - Jun Cao
- Dahua Hospital
- Shanghai 200237
- China
| | - Yourong Duan
- State Key Laboratory of Oncogenes and Related Genes
- Shanghai Cancer Institute
- Renji Hospital
- School of Medicine
- Shanghai Jiao Tong University
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11
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Au nanoparticle clusters from deposition of a coalescing emulsion. J Colloid Interface Sci 2015; 450:417-423. [PMID: 25863224 DOI: 10.1016/j.jcis.2015.03.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 03/10/2015] [Accepted: 03/10/2015] [Indexed: 11/20/2022]
Abstract
HYPOTHESIS Nanoparticle adsorption at the oil-water interface in an unstable, coalescing emulsion leads to cluster formation. EXPERIMENTS Stable suspensions of clusters are prepared using a facile, two-step procedure involving few reagents and neither thiolated compounds nor chlorinated solvents. First, colloidal gold nanoparticles are assembled at the aqueous-hexanol interface in an emulsion that rapidly coalesces and spontaneously deposits a film on the interior surface of the glass container. The film is dissolved in ethanol with sonication to disperse the clusters. The film and clusters are characterized by transmission electron and atomic force microscopies as well as ultraviolet-visible spectrometry. FINDINGS Clusters are observed to contain as few as 8 to as many as 24 Au nanoparticles. The clusters are anisotropic and can also be formed from larger nanoparticles. Hydrophobic and hydrophilic interactions are implicated in the formation of these clusters within the interfacial tension gradients of a coalescing emulsion. The clusters can be re-suspended in ethanol and water, maximizing the utility of these clusters with an extinction band in the near-Infrared region of the electromagnetic spectrum.
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12
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Zhang H, Wang H, Du K, Ma X, Wang J. Constructing nanosized CdTe nanocrystal clusters with thermo-responsive photoluminescence characteristics. RSC Adv 2015. [DOI: 10.1039/c5ra20111j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Photoluminescence clusters of CdTe nanocrystals self-assembled by PNAEAM-b-PNIPAM copolymers represent sensitive and reversible thermo-responsive properties in aqueous solutions.
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Affiliation(s)
- Hucheng Zhang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Huili Wang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Kelu Du
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Xinxin Ma
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Jianji Wang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
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13
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Xiaoqing L, Ruiyi L, Xiaohuan L, Zaijun L. Ultra sensitive and wide-range pH sensor based on the BSA-capped Cu nanoclusters fabricated by fast synthesis through the use of hydrogen peroxide additive. RSC Adv 2015. [DOI: 10.1039/c5ra07966g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study reports a new pH sensor based on BSA-capped copper nanoclusters. The proposed pH sensor provides better sensitivity and a wider ranging pH response compared with other metal nanoclusters reported in the literature.
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Affiliation(s)
- Liao Xiaoqing
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
| | - Li Ruiyi
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
| | - Long Xiaohuan
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
| | - Li Zaijun
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
- The University of Birmingham
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