1
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Ferreira RS, Lira AL, Sousa AA. Quantitative mechanistic model for ultrasmall nanoparticle-protein interactions. NANOSCALE 2020; 12:19230-19240. [PMID: 32929438 DOI: 10.1039/d0nr04846a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
To date, extensive effort has been devoted toward the characterization of protein interactions with synthetic nanostructures. However, much remains to be understood, particularly concerning microscopic mechanisms of interactions. Here, we have conducted a detailed investigation of the kinetics of nanoparticle-protein complexation to gain deeper insights into the elementary steps and molecular events along the pathway for complex formation. Toward that end, the binding kinetics between p-mercaptobenzoic acid-coated ultrasmall gold nanoparticles (AuMBA) and fluorescently-labeled ubiquitin was investigated at millisecond time resolution using stopped-flow spectroscopy. It was found that both the association and dissociation kinetics consisted of multiple exponential phases, hence suggesting a complex, multi-step reaction mechanism. The results fit into a picture where complexation proceeds through the formation of a weakly-bound first-encounter complex with an apparent binding affinity (KD) of ∼9 μM. Encounter complex formation is followed by unimolecular tightening steps of partial desolvation/ion removal and conformational rearrangement, which, collectively, achieve an almost 100-fold increase in affinity of the final bound state (apparent KD ∼0.1 μM). The final state is found to be weakly stabilized, displaying an average lifetime in the range of seconds. Screening of the electrostatic forces at high ionic strength weakens the AuMBA-ubiquitin interactions by destabilizing the encounter complex, whereas the average lifetime of the final bound state remains largely unchanged. Overall, our rapid kinetics investigation has revealed novel quantitative insights into the molecular-level mechanisms of ultrasmall nanoparticle-protein interactions.
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Affiliation(s)
- Rodrigo S Ferreira
- Department of Biochemistry, Federal University of São Paulo, São Paulo, SP 04044-020, Brazil.
| | - André L Lira
- Department of Biochemistry, Federal University of São Paulo, São Paulo, SP 04044-020, Brazil.
| | - Alioscka A Sousa
- Department of Biochemistry, Federal University of São Paulo, São Paulo, SP 04044-020, Brazil.
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2
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Maysinger D, Zhang Q, Kakkar A. Dendrimers as Modulators of Brain Cells. Molecules 2020; 25:E4489. [PMID: 33007959 PMCID: PMC7582352 DOI: 10.3390/molecules25194489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/27/2020] [Accepted: 09/29/2020] [Indexed: 12/19/2022] Open
Abstract
Nanostructured hyperbranched macromolecules have been extensively studied at the chemical, physical and morphological levels. The cellular structural and functional complexity of neural cells and their cross-talk have made it rather difficult to evaluate dendrimer effects in a mixed population of glial cells and neurons. Thus, we are at a relatively early stage of bench-to-bedside translation, and this is due mainly to the lack of data valuable for clinical investigations. It is only recently that techniques have become available that allow for analyses of biological processes inside the living cells, at the nanoscale, in real time. This review summarizes the essential properties of neural cells and dendrimers, and provides a cross-section of biological, pre-clinical and early clinical studies, where dendrimers were used as nanocarriers. It also highlights some examples of biological studies employing dendritic polyglycerol sulfates and their effects on glia and neurons. It is the aim of this review to encourage young scientists to advance mechanistic and technological approaches in dendrimer research so that these extremely versatile and attractive nanostructures gain even greater recognition in translational medicine.
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Affiliation(s)
- Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada;
| | - Qiaochu Zhang
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada;
- Department of Chemistry, McGill University, 801 Sherbrooke St West, Montreal, QC H3A 0B8, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St West, Montreal, QC H3A 0B8, Canada
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3
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Knittel LL, Zhao H, Nguyen A, Miranda A, Schuck P, Sousa AA. Ultrasmall Gold Nanoparticles Coated with Zwitterionic Glutathione Monoethyl Ester: A Model Platform for the Incorporation of Functional Peptides. J Phys Chem B 2020; 124:3892-3902. [PMID: 32352799 PMCID: PMC8435207 DOI: 10.1021/acs.jpcb.0c01444] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ultrasmall gold nanoparticles (AuNPs) are an emerging class of nanomaterials exhibiting distinctive physicochemical, molecular, and in vivo properties. Recently, we showed that ultrasmall AuNPs encompassing a zwitterionic glutathione monoethyl ester surface coating (AuGSHzwt) were highly resistant to aggregation and serum protein interactions. Herein, we performed a new set of biointeraction studies to gain a more fundamental understanding into the behavior of both pristine and peptide-functionalized AuGSHzwt in complex media. Using the model Strep-tag peptide (WSHPQFEK) as an integrated functional group, we established that AuGSHzwt could be conjugated with increasing numbers of Strep-tags by simple ligand exchange, which provides a generic approach for AuGSHzwt functionalization. It was found that the strep-tagged AuGSHzwt particles were highly resistant to nonspecific protein interactions and retained their targeting capability in biological fluid, displaying efficient binding to Streptactin receptors in nearly undiluted serum. However, AuGSHzwt functionalized with multiple Strep-tags displayed somewhat lower resistance to protein interactions and lower levels of binding to Streptactin than monofunctionalized AuGSHzwt under given conditions. These results underscore the need for optimizing ligand density onto the surface of ultrasmall AuNPs for improved performance. Collectively, our findings support ultrasmall AuGSHzwt as an attractive platform for engineering functional, protein-mimetic nanostructures capable of specific protein recognition within the complex biological milieu.
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Affiliation(s)
- Luiza L. Knittel
- Department of Biochemistry, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Huaying Zhao
- National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, USA
| | - Ai Nguyen
- National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, USA
| | - Antônio Miranda
- Department of Biochemistry, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Peter Schuck
- National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, USA
| | - Alioscka A. Sousa
- Department of Biochemistry, Federal University of São Paulo, São Paulo, SP, Brazil
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4
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Maysinger D, Ji J. Nanostructured Modulators of Neuroglia. Curr Pharm Des 2019; 25:3905-3916. [PMID: 31512994 DOI: 10.2174/1381612825666190912163339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 06/08/2019] [Indexed: 01/08/2023]
Abstract
Biological and synthetic nanostructures can influence both glia and neurons in the central nervous system. Neurons represent only a small proportion (about 10%) of cells in the brain, whereas glial cells are the most abundant cell type. Non-targeted nanomedicines are mainly internalized by glia, in particular microglia, and to a lesser extent by astrocytes. Internalized nanomedicines by glia indirectly modify the functional status of neurons. The mechanisms of biochemical, morphological and functional changes of neural cells exposed to nanomedicines are still not well-understood. This minireview provides a cross-section of morphological and biochemical changes in glial cells and neurons exposed to different classes of hard and soft nanostructures.
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Affiliation(s)
- Dusica Maysinger
- Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montreal, Quebec H3AOG4, Canada
| | - Jeff Ji
- Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montreal, Quebec H3AOG4, Canada
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5
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George A, Sundar A, Nair AS, Maman MP, Pathak B, Ramanan N, Mandal S. Identification of Intermediate Au 22(SR) 4(SR') 14 Cluster on Ligand-Induced Transformation of Au 25(SR) 18 Nanocluster. J Phys Chem Lett 2019; 10:4571-4576. [PMID: 31339731 DOI: 10.1021/acs.jpclett.9b01856] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report the ligand-exchange-induced transformation from an icosahedral Au25(SR)18 cluster (where SR = 2-phenylethanethiol (PET)) to a bitetrahedral Au22(SR)4(SR')14 cluster (where SR' = 4-tert-butylbenzenethiol (TBBT)). This partial exchange of the ligands was achieved by controlling the concentration of the incoming TBBT ligand. Being a bulky and aromatic ligand, TBBT can efficiently distort the atomic structure of the Au25PET18 cluster, resulting in Au22(PET)4(TBBT)14, which is highly stable and considered to be an intermediate with a bitetrahedral structure. Time-dependent mass spectrometry and optical spectroscopy revealed the dissociation of the parent cluster and gave a deep insight on the ligand-exchange mechanism. Theoretical calculations and extended X-ray absorption fine structure studies confirm the formation of the Au22 structure. Identifying the atomic structure of the intermediate species opens a new avenue to study the transformation of one cluster to another.
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Affiliation(s)
- Anu George
- School of Chemistry , Indian Institute of Science Education and Research Thiruvananthapuram , Maruthamala PO, Trivandrum 695551 , India
| | - Anusree Sundar
- School of Chemistry , Indian Institute of Science Education and Research Thiruvananthapuram , Maruthamala PO, Trivandrum 695551 , India
| | - Akhil S Nair
- Discipline of Chemistry, School of Basic Sciences , Indian Institute of Technology , Indore 453552 , India
| | - Manju P Maman
- School of Chemistry , Indian Institute of Science Education and Research Thiruvananthapuram , Maruthamala PO, Trivandrum 695551 , India
| | - Biswarup Pathak
- Discipline of Chemistry, School of Basic Sciences , Indian Institute of Technology , Indore 453552 , India
| | - Nitya Ramanan
- Alba Synchrotron , Carrer delallum 2-26 , Cerdanyola del valles, 08290 Barcelona , Spain
| | - Sukhendu Mandal
- School of Chemistry , Indian Institute of Science Education and Research Thiruvananthapuram , Maruthamala PO, Trivandrum 695551 , India
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6
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Wang Y, Kadiyala U, Qu Z, Elvati P, Altheim C, Kotov NA, Violi A, VanEpps JS. Anti-Biofilm Activity of Graphene Quantum Dots via Self-Assembly with Bacterial Amyloid Proteins. ACS NANO 2019; 13:4278-4289. [PMID: 30912922 PMCID: PMC6528478 DOI: 10.1021/acsnano.8b09403] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Bacterial biofilms represent an essential part of Earth's ecosystem that can cause multiple ecological, technological, and health problems. The environmental resilience and sophisticated organization of biofilms are enabled by the extracellular matrix that creates a protective network of biomolecules around the bacterial community. Current anti-biofilm agents can interfere with extracellular matrix production but, being based on small molecules, are degraded by bacteria and rapidly diffuse away from biofilms. Both factors severely reduce their efficacy, while their toxicity to higher organisms creates additional barriers to their practicality. In this paper, we report on the ability of graphene quantum dots to effectively disperse mature amyloid-rich Staphylococcus aureus biofilms, interfering with the self-assembly of amyloid fibers, a key structural component of the extracellular matrix. Mimicking peptide-binding biomolecules, graphene quantum dots form supramolecular complexes with phenol-soluble modulins, the peptide monomers of amyloid fibers. Experimental and computational results show that graphene quantum dots efficiently dock near the N-terminus of the peptide and change the secondary structure of phenol-soluble modulins, which disrupts their fibrillation and represents a strategy for mitigation of bacterial communities.
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Affiliation(s)
- Yichun Wang
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
| | - Usha Kadiyala
- Department of Emergency Medicine, Ann Arbor, MI 48109 USA
| | - Zhibei Qu
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
| | - Paolo Elvati
- Department of Mechanical Engineering, Ann Arbor, MI 48109 USA
| | | | - Nicholas A. Kotov
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
- Department of Biomedical Engineering, Ann Arbor, MI 48109 USA
- Department of Materials Science and Engineering, Ann Arbor, MI 48109 USA
- Department of Macromolecular Science and Engineering, Ann Arbor, MI 48109 USA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI 48109 USA
| | - Angela Violi
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Department of Mechanical Engineering, Ann Arbor, MI 48109 USA
- Department of Materials Science and Engineering, Ann Arbor, MI 48109 USA
- Biophysics Program, University of Michigan, Ann Arbor, MI 48109 USA
| | - J. Scott VanEpps
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
- Department of Emergency Medicine, Ann Arbor, MI 48109 USA
- Department of Biomedical Engineering, Ann Arbor, MI 48109 USA
- Department of Macromolecular Science and Engineering, Ann Arbor, MI 48109 USA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI 48109 USA
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7
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Peixoto de Almeida M, Quaresma P, Sousa S, Couto C, Gomes I, Krippahl L, Franco R, Pereira E. Measurement of adsorption constants of laccase on gold nanoparticles to evaluate the enhancement in enzyme activity of adsorbed laccase. Phys Chem Chem Phys 2018; 20:16761-16769. [PMID: 29882945 DOI: 10.1039/c8cp03116a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adsorption of enzymes to nanoparticles and the mechanisms responsible for enzyme activity modulation of adsorbed enzymes are not well understood. In this work, gold nanoparticles were used for electrostatic adsorption of a plant-derived laccase. Adsorption constants were determined by four independent techniques: dynamic light scattering, electrophoretic light scattering, agarose gel electrophoresis and fluorescence quenching. Stable bionanoconjugates were formed with log K in the range 6.8-8.9. An increase in enzyme activity was detected, in particular at acidic and close to neutral pH values, a feature that expands the useful pH range of the enzyme. A model for the adsorption was developed, based on geometrical considerations and volume increase data from dynamic light scattering. This indicates that enzymes adsorbed to gold nanoparticles are ca. 9 times more active than the free enzyme.
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Affiliation(s)
- Miguel Peixoto de Almeida
- LAQV, REQUIMTE, Departamento de Química e Bioquímica, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.
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8
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Kang X, Chong H, Zhu M. Au 25(SR) 18: the captain of the great nanocluster ship. NANOSCALE 2018; 10:10758-10834. [PMID: 29873658 DOI: 10.1039/c8nr02973c] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Noble metal nanoclusters are in the intermediate state between discrete atoms and plasmonic nanoparticles and are of significance due to their atomically accurate structures, intriguing properties, and great potential for applications in various fields. In addition, the size-dependent properties of nanoclusters construct a platform for thoroughly researching the structure (composition)-property correlations, which is favorable for obtaining novel nanomaterials with enhanced physicochemical properties. Thus far, more than 100 species of nanoclusters (mono-metallic Au or Ag nanoclusters, and bi- or tri-metallic alloy nanoclusters) with crystal structures have been reported. Among these nanoclusters, Au25(SR)18-the brightest molecular star in the nanocluster field-is capable of revealing the past developments and prospecting the future of the nanoclusters. Since being successfully synthesized (in 1998, with a 20-year history) and structurally determined (in 2008, with a 10-year history), Au25(SR)18 has stimulated the interest of chemists as well as material scientists, due to the early discovery, easy preparation, high stability, and easy functionalization and application of this molecular star. In this review, the preparation methods, crystal structures, physicochemical properties, and practical applications of Au25(SR)18 are summarized. The properties of Au25(SR)18 range from optics and chirality to magnetism and electrochemistry, and the property-oriented applications include catalysis, chemical imaging, sensing, biological labeling, biomedicine and beyond. Furthermore, the research progress on the Ag-based M25(SR)18 counterpart (i.e., Ag25(SR)18) is included in this review due to its homologous composition, construction and optical absorption to its gold-counterpart Au25(SR)18. Moreover, the alloying methods, metal-exchange sites and property alternations based on the templated Au25(SR)18 are highlighted. Finally, some perspectives and challenges for the future research of the Au25(SR)18 nanocluster are proposed (also holding true for all members in the nanocluster field). This review is directed toward the broader scientific community interested in the metal nanocluster field, and hopefully opens up new horizons for scientists studying nanomaterials. This review is based on the publications available up to March 2018.
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Affiliation(s)
- Xi Kang
- Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Institute of Physical Science and Information Technology and AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China.
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9
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Hollas MA, Webb SJ, Flitsch SL, Fielding AJ. A Bifunctional Spin Label for Ligand Recognition on Surfaces. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Michael A. Hollas
- Department of Chemistry; Photon Science Institute; University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Simon J. Webb
- Department of Chemistry; Manchester Institute of Biotechnology; University of Manchester; 131 Princess Street Manchester M1 7DN UK
| | - Sabine L. Flitsch
- Department of Chemistry; Manchester Institute of Biotechnology; University of Manchester; 131 Princess Street Manchester M1 7DN UK
| | - Alistair J. Fielding
- Department of Chemistry; Photon Science Institute; University of Manchester; Oxford Road Manchester M13 9PL UK
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10
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Hollas MA, Webb SJ, Flitsch SL, Fielding AJ. A Bifunctional Spin Label for Ligand Recognition on Surfaces. Angew Chem Int Ed Engl 2017; 56:9449-9453. [PMID: 28570782 PMCID: PMC5577508 DOI: 10.1002/anie.201703929] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 05/22/2017] [Indexed: 01/21/2023]
Abstract
In situ monitoring of biomolecular recognition, especially at surfaces, still presents a significant technical challenge. Electron paramagnetic resonance (EPR) of biomolecules spin-labeled with nitroxides can offer uniquely sensitive and selective insights into these processes, but new spin-labeling strategies are needed. The synthesis and study of a bromoacrylaldehyde spin label (BASL), which features two attachment points with orthogonal reactivity is reported. The first examples of mannose and biotin ligands coupled to aqueous carboxy-functionalized gold nanoparticles through a spin label are presented. EPR spectra were obtained for the spin-labeled ligands both free in solution and attached to nanoparticles. The labels were recognized by the mannose-binding lectin, Con A, and the biotin-binding protein avidin-peroxidase. Binding gave quantifiable changes in the EPR spectra from which binding profiles could be obtained that reflect the strength of binding in each case.
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Affiliation(s)
- Michael A Hollas
- Department of Chemistry, Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Simon J Webb
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Sabine L Flitsch
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Alistair J Fielding
- Department of Chemistry, Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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11
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Study of Efficiency of Coupling Peptides with Gold Nanoparticles. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1016/s1872-2040(17)61013-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12
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Luo K, Hu C, Luo Y, Li D, Xiang Y, Mu Y, Wang H, Luo Z. One-pot synthesis of ultrafine amphiphilic Janus gold nanoparticles by toluene/water emulsion reaction. RSC Adv 2017. [DOI: 10.1039/c7ra10323a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Spontaneous phase separation of capping ligands at emulsion interfaces was used to synthesize amphiphilic Janus gold nanoparticles in batch.
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Affiliation(s)
- Kun Luo
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Chengliang Hu
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Yujia Luo
- The First Hospital of China Medical University
- Shenyang 10122
- P. R. China
| | - Degui Li
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Yongdong Xiang
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Yuanying Mu
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Haiming Wang
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Zhihong Luo
- College of Materials Science and Engineering
- Guilin University of Technology
- Guilin 541004
- P. R. China
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13
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Jin R, Zeng C, Zhou M, Chen Y. Atomically Precise Colloidal Metal Nanoclusters and Nanoparticles: Fundamentals and Opportunities. Chem Rev 2016; 116:10346-413. [DOI: 10.1021/acs.chemrev.5b00703] [Citation(s) in RCA: 1953] [Impact Index Per Article: 244.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Rongchao Jin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Chenjie Zeng
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Meng Zhou
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Yuxiang Chen
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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14
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Song CK, Luck KA, Zhou N, Zeng L, Heitzer HM, Manley EF, Goldman S, Chen LX, Ratner MA, Bedzyk MJ, Chang RPH, Hersam MC, Marks TJ. “Supersaturated” Self-Assembled Charge-Selective Interfacial Layers for Organic Solar Cells. J Am Chem Soc 2014; 136:17762-73. [DOI: 10.1021/ja508453n] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Charles Kiseok Song
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Kyle A. Luck
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Nanjia Zhou
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Li Zeng
- Graduate
Program in Applied Physics, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Henry M. Heitzer
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Eric F. Manley
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Samuel Goldman
- Weinberg
College of Arts and Science, Northwestern University, 1918 Sheridan
Road, Evanston, Illinois 60208, United States
| | - Lin X. Chen
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Mark A. Ratner
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Michael J. Bedzyk
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
- Graduate
Program in Applied Physics, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Robert P. H. Chang
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Mark C. Hersam
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department
of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering and the Argonne-Northwestern
Solar Energy Research Center, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208, United States
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15
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Zhang YM, Wang X, Li W, Zhang W, Li M, Zhang SXA. Bio-inspired enol-degradation for multipurpose oxygen sensing. Chem Commun (Camb) 2014; 50:13477-80. [DOI: 10.1039/c4cc05831c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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16
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Yeh FY, Tseng IH, Chuang SH, Lin CS. Spacer-enhanced chymotrypsin-activated peptide-functionalized gold nanoparticle probes: a rapid assay for the diagnosis of pancreatitis. RSC Adv 2014. [DOI: 10.1039/c4ra00258j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A spacer-enhanced FITC-labeled peptide self-assembled onto AuNPs was fabricated as a chymotrypsin activated fluorescent AuNP probe and was used for the diagnosis of pancreatitis with fecal specimens.
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Affiliation(s)
- Fang-Yuan Yeh
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
| | - I-Hua Tseng
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
| | - Shu-Hung Chuang
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
- Department of Surgery
- Mackay Memorial Hospital
| | - Chih-Sheng Lin
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
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Krpetić Z, Davidson AM, Volk M, Lévy R, Brust M, Cooper DL. High-resolution sizing of monolayer-protected gold clusters by differential centrifugal sedimentation. ACS NANO 2013; 7:8881-8890. [PMID: 24063653 DOI: 10.1021/nn403350v] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Differential centrifugal sedimentation (DCS) has been applied to accurately size ligand-protected gold hydrosols in the 10 to 50 nm range. A simple protocol is presented to correct for particle density variations due to the presence of the ligand shell, which is formed here by either polyethylene glycol-substituted alkane thiols (PEG-alkane thiols) of different chain length or oligopeptides. The method gives reliable data for all particle sizes investigated and lends itself to rapid routine sizing of nanoparticles. Unlike TEM, DCS is highly sensitive to small changes in the thickness of the organic ligand shell and can be applied to monitor shell thickness variations of as little as 0.1 nm on particles of a given core size.
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Affiliation(s)
- Zeljka Krpetić
- Department of Chemistry, University of Liverpool , Liverpool L69 7ZD, United Kingdom
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