51
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Chen S, Li M, Yu S, Louisia S, Chuang W, Gao M, Chen C, Jin J, Salmeron MB, Yang P. Ligand removal of Au 25 nanoclusters by thermal and electrochemical treatments for selective CO 2 electroreduction to CO. J Chem Phys 2021; 155:051101. [PMID: 34364344 DOI: 10.1063/5.0059363] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Undercoordinated metal nanoclusters have shown great promise for various catalytic applications. However, their activity is often limited by the covalently bonded ligands, which could block the active surface sites. Here, we investigate the ligand removal process for Au25 nanoclusters using both thermal and electrochemical treatments, as well as its impact on the electroreduction of CO2 to CO. The Au25 nanoclusters are synthesized with 2-phenylethanethiol as the capping agent and anchored on sulfur-doped graphene. The thiolate ligands can be readily removed under either thermal annealing at ≥180°C or electrochemical biasing at ≤-0.5 V vs reversible hydrogen electrode, as evidenced by the Cu underpotential deposition surface area measurement, x-ray photoelectron spectroscopy, and extended x-ray absorption fine structure spectroscopy. However, these ligand-removing treatments also trigger the structural evolution of Au25 nanoclusters concomitantly. The thermally and electrochemically treated Au25 nanoclusters show enhanced activity and selectivity for the electrochemical CO2-to-CO conversion than their pristine counterpart, which is attributed to the exposure of undercoordinated Au sites on the surface after ligand removal. This work provides facile strategies to strip away the staple ligands from metal nanoclusters and highlights its importance in promoting the catalytic performances.
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Affiliation(s)
- Shouping Chen
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
| | - Mufan Li
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Sunmoon Yu
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
| | - Sheena Louisia
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Wesley Chuang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Mengyu Gao
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
| | - Chubai Chen
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Jianbo Jin
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Miquel B Salmeron
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
| | - Peidong Yang
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
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52
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Domínguez-Castro A, Frauenheim T. Impact of vibronic coupling effects on light-driven charge transfer in pyrene-functionalized middle and large-sized metalloid gold nanoclusters from Ehrenfest dynamics. Phys Chem Chem Phys 2021; 23:17129-17133. [PMID: 34355230 DOI: 10.1039/d1cp02890a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Theoretical calculations are an effective strategy to complement and understand the experimental results in atomistic detail. Ehrenfest molecular dynamics simulations based on the real-time time-dependent density functional tight-binding (RT-TDDFTB) approach are performed to reveal for the first time the electron dynamics for the charge separation of pyrene-functionalized middle-sized Au70S20(PH3)16 and large-sized Au108S24(PR3)16 (R = H, CH3, C2H5, C6H5) clusters. The proposed mechanism uncovers an ultrafast and irreversible photoinduced charge transfer from the gold nanocluster (GNC) unit to the pyrene derivative in all cases. By a Fourier transform analysis of the dynamics, the effect of vibronic couplings is highlighted. The Au108S24(PPh3)15PPh2Pyr system exhibits the best performance for charge separation.
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53
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Xu X, Yu Y, Hu Q, Chen S, Nyholm L, Zhang Z. Redox Buffering Effects in Potentiometric Detection of DNA Using Thiol-Modified Gold Electrodes. ACS Sens 2021; 6:2546-2552. [PMID: 34184534 PMCID: PMC8314270 DOI: 10.1021/acssensors.0c02700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Label-free potentiometric
detection of DNA molecules using a field-effect
transistor (FET) with a gold gate offers an electrical sensing platform
for rapid, straightforward, and inexpensive analyses of nucleic acid
samples. To induce DNA hybridization on the FET sensor surface to
enable potentiometric detection, probe DNA that is complementary to
the target DNA has to be immobilized on the FET gate surface. A common
method for probe DNA functionalization is based on thiol–gold
chemistry, immobilizing thiol-modified probe DNA on a gold gate with
thiol–gold bonds. A self-assembled monolayer (SAM), based on
the same thiol–gold chemistry, is also needed to passivate
the rest of the gold gate surface to prevent non-specific adsorption
and to enable favorable steric configuration of the probe DNA. Herein,
the applicability of such FET-based potentiometric DNA sensing was
carefully investigated, using a silicon nanoribbon FET with a gold-sensing
gate modified with thiol–gold chemistry. We discover that the
potential of the gold-sensing electrode is determined by the mixed
potential of the gold–thiol and gold–oxygen redox interactions.
This mixed potential gives rise to a redox buffer effect which buffers
the change in the surface charge induced by the DNA hybridization,
thus suppressing the potentiometric signal. Analogous redox buffer
effects may also be present for other types of potentiometric detections
of biomarkers based on thiol–gold chemistry.
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Affiliation(s)
- Xingxing Xu
- Division of Solid-State Electronics, Department of Electrical Engineering, Ångström Laboratory, Uppsala University, P.O. Box 65, Uppsala SE-75103, Sweden
| | - Yingtao Yu
- Division of Solid-State Electronics, Department of Electrical Engineering, Ångström Laboratory, Uppsala University, P.O. Box 65, Uppsala SE-75103, Sweden
| | - Qitao Hu
- Division of Solid-State Electronics, Department of Electrical Engineering, Ångström Laboratory, Uppsala University, P.O. Box 65, Uppsala SE-75103, Sweden
| | - Si Chen
- Division of Solid-State Electronics, Department of Electrical Engineering, Ångström Laboratory, Uppsala University, P.O. Box 65, Uppsala SE-75103, Sweden
| | - Leif Nyholm
- Department of Chemistry-Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Zhen Zhang
- Division of Solid-State Electronics, Department of Electrical Engineering, Ångström Laboratory, Uppsala University, P.O. Box 65, Uppsala SE-75103, Sweden
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54
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Cowan MJ, Nagarajan AV, Mpourmpakis G. Correlating structural rules with electronic properties of ligand-protected alloy nanoclusters. J Chem Phys 2021; 155:024303. [PMID: 34266280 DOI: 10.1063/5.0056690] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Thiolate protected gold nanoclusters (TPNCs) are a unique class of nanomaterials finding applications in various fields, such as biomedicine, optics, and catalysis. The atomic precision of their structure, characterized through single crystal x-ray diffraction, enables the accurate investigation of their physicochemical properties through electronic structure calculations. Recent experimental efforts have led to the successful heterometal doping of TPNCs, potentially unlocking a large domain of bimetallic TPNCs for targeted applications. However, how TPNC size, bimetallic composition, and location of dopants influence electronic structure is unknown. To this end, we introduce novel structure-property relationships (SPRs) that predict electronic properties such as ionization potential (IP) and electron affinity (EA) of AgAu TPNCs based on physically relevant descriptors. The models are constructed by first generating a hypothetical AgAu TPNC dataset of 368 structures with sizes varying from 36 to 279 metal atoms. Using our dataset calculated with density functional theory (DFT), we employed systematic analyses to unravel size, composition, and, importantly, core-shell effects on TPNC EA and IP behavior. We develop generalized SPRs that are able to predict electronic properties across the AgAu TPNC materials space. The models leverage the same three fundamental descriptors (i.e., size, composition, and core-shell makeup) that do not require DFT calculations and rely only on simple atom counting, opening avenues for high throughput bimetallic TPNC screening for targeted applications. This work is a first step toward finely controlling TPNC electronic properties through heterometal doping using high throughput computational means.
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Affiliation(s)
- Michael J Cowan
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15216, USA
| | | | - Giannis Mpourmpakis
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15216, USA
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55
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Franco-Ulloa S, Guarnieri D, Riccardi L, Pompa PP, De Vivo M. Association Mechanism of Peptide-Coated Metal Nanoparticles with Model Membranes: A Coarse-Grained Study. J Chem Theory Comput 2021; 17:4512-4523. [PMID: 34077229 PMCID: PMC8280734 DOI: 10.1021/acs.jctc.1c00127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Indexed: 11/28/2022]
Abstract
Functionalized metal nanoparticles (NPs) hold great promise as innovative tools in nanomedicine. However, one of the main challenges is how to optimize their association with the cell membrane, which is critical for their effective delivery. Recent findings show high cellular uptake rates for NPs coated with the polycationic cell-penetrating peptide gH625-644 (gH), although the underlying internalization mechanism is poorly understood. Here, we use extended coarse-grained simulations and free energy calculations to study systems that simultaneously include metal NPs, peptides, lipids, and sterols. In particular, we investigate the first encounter between multicomponent model membranes and 2.5 nm metal NPs coated with gH (gHNPs), based on the evidence from scanning transmission electron microscopy. By comparing multiple membrane and (membranotropic) NP models, we found that gHNP internalization occurs by forming an intermediate state characterized by specific stabilizing interactions formed by peptide-coated nanoparticles with multicomponent model membranes. This association mechanism is mainly characterized by interactions of gH with the extracellular solvent and the polar membrane surface. At the same time, the NP core interacts with the transmembrane (cholesterol-rich) fatty phase.
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Affiliation(s)
- Sebastian Franco-Ulloa
- Molecular
Modeling and Drug Discovery Lab, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Daniela Guarnieri
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, Fisciano, l-84084 Salerno, Italy
| | - Laura Riccardi
- Molecular
Modeling and Drug Discovery Lab, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Pier Paolo Pompa
- Nanobiointeractions
& Nanodiagnostics, Istituto Italiano
di Tecnologia, Via Morego
30, 16163 Genova, Italy
| | - Marco De Vivo
- Molecular
Modeling and Drug Discovery Lab, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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56
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Swierczewski M, Maroni P, Chenneviere A, Dadras MM, Lee LT, Bürgi T. Deposition of Extended Ordered Ultrathin Films of Au 38 (SC 2 H 4 Ph) 24 Nanocluster using Langmuir-Blodgett Technique. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2005954. [PMID: 33559304 DOI: 10.1002/smll.202005954] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Langmuir-Blodgett technique is utilized to deposit ultrathin films of Au38 (SC2 H4 Ph)24 nanocluster onto solid surfaces such as mica and silicon. The morphologies of the films transferred at various surface pressures within the mono/bi/trilayer regime are studied by atomic force microscopy (AFM). The time spent on the water surface before the deposition has a decisive effect on the final ordering of nanoclusters within the network and is studied by fast AFM, X-ray reflectivity, and grazing-incidence wide-angle X-ray scattering.
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Affiliation(s)
- Michal Swierczewski
- Department of Physical Chemistry, University of Geneva, Geneva, 30 Quai Ernest-Ansermet, Geneva 4, CH-1211, Switzerland
| | - Plinio Maroni
- Department of Physical Chemistry, University of Geneva, Geneva, 30 Quai Ernest-Ansermet, Geneva 4, CH-1211, Switzerland
| | - Alexis Chenneviere
- Laboratoire Léon Brillouin, UMR12 CEA-CNRS, Université Paris-Saclay, CEA-Saclay, Gif-sur-Yvette Cedex, 91191, France
| | - Mohammad M Dadras
- CSEM Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, 2002, Switzerland
| | - Lay-Theng Lee
- Laboratoire Léon Brillouin, UMR12 CEA-CNRS, Université Paris-Saclay, CEA-Saclay, Gif-sur-Yvette Cedex, 91191, France
| | - Thomas Bürgi
- Department of Physical Chemistry, University of Geneva, Geneva, 30 Quai Ernest-Ansermet, Geneva 4, CH-1211, Switzerland
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57
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Shyni V, Leenaraj DR, Ittyachan R, Joseph L, Sajan D. Anticancer activity of indapamide adsorbed on gold nanoparticles: DFT, in-silico, and in-vitro analysis. J Mol Recognit 2021; 34:e2920. [PMID: 34114274 DOI: 10.1002/jmr.2920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/25/2021] [Indexed: 11/11/2022]
Abstract
The adsorption properties of the lung cancer agent indapamide (IND) on gold nanoparticles (AuNPs), were studied with the help of surface-enhanced Raman scattering techniques. The structure-activity of the IND and INDA molecule has been studied using DFT/B3LYP methodology. NBO analysis reveals that, both the molecules are stabilized by a C─H… O intramolecular hydrogen bonding, apart from the conjugative and intramolecular charge transfer interactions. The analysis of the electron density of frontier molecular orbital analysis gives a comparative idea of the reactivity, the low kinetic stability, and low value of energy gap indicating the electron transport in the molecule and thereby its bioactivity. The molecular electrostatic potential, local and global reactivity indicators predict the reactive site of the molecules. FT-IR, FT-Raman, and surface-enhanced Raman scattering have been investigated and compared with the theoretical prediction. Effective in-silico (molecular docking) biological activity screening of the molecules was checked on lung cancer cells. In-vitro (surface-enhanced Raman scattering techniques and MTT assay) analysis confirms the results from the in-silico analysis. This study promotes the potential of SERS agents for targeted drug delivery and photothermal therapy and the novelty of the IND and INDA molecule against lung cancer activity.
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Affiliation(s)
- V Shyni
- Centre for Advanced Functional Materials, Department of Physics, Bishop Moore College, Mavelikara, Kerala, 690110, India
| | - D R Leenaraj
- Department of Physics, Mar Ivanios College, Thiruvananthapuram, India
| | - Reena Ittyachan
- Department of Physics, Sacred Heart College, Thrissur, India
| | - Lynnette Joseph
- Centre for Advanced Functional Materials, Department of Physics, Bishop Moore College, Mavelikara, Kerala, 690110, India
| | - D Sajan
- Centre for Advanced Functional Materials, Department of Physics, Bishop Moore College, Mavelikara, Kerala, 690110, India
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58
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Thirupathi A, Sorato HR, Silva PRL, Damiani AP, Andrade VM, Silveira PCL, Nesi RT, Paula MMS, Pinho RA. Effect of taurine associated gold nanoparticles on oxidative stress in muscle of mice exposed to overuse model. AN ACAD BRAS CIENC 2021; 93:e20191450. [PMID: 34076038 DOI: 10.1590/0001-3765202120191450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 02/05/2020] [Indexed: 11/21/2022] Open
Abstract
Muscle overuse and its consequent muscle damage has no cure. Therefore, the present study aimed to investigate the regulatory role of tau-AuNPs on muscle recovery of muscle overuse model. The animals (Male Swiss mice) were randomly divided into four groups: Control (Ctr; n=6); tau-AuNPs (n=6); overuse (n=6); and overuse plus tau-AuNPs (n=6). Exercise sessions were performed for 21 consecutive days, and one exercise model was applied daily in the following sequence: low intensity, moderate intensity, and high intensity. The mice were then sacrificed. The quadriceps muscles were surgically removed for subsequent biochemical analysis (oxidative stress parameters, DNA damage markers and muscle differentiation protein). The overuse group significantly increased the oxidative stress parameters and DNA damage markers, whereas tau-AuNPs significantly decreased the oxidative stress parameters in the overuse animal model. However, there were no significant differences observed between overuse group and overuse plus tau-AuNPs administrated group in relation to DNA damage markers including DNA damage frequency and index levels when compared to control and tau-AuNPs groups. Muscle differentiation protein Myf-5 was increased in the overuse plus tau-AuNPs administration group when compared to control group. In conclusion, tau-AuNPs had significant effect on reducing oxidative stress parameters and increasing myogenic regulatory protein Myf-5 in the overuse group. However, it did not have significant effect on reducing DNA damage.
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Affiliation(s)
- Anand Thirupathi
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China
| | - Helen R Sorato
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Unidade de Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000 Criciúma, SC, Brazil
| | - Paulo R L Silva
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Unidade de Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000 Criciúma, SC, Brazil
| | - Adriani P Damiani
- Laboratório de Biologia Molecular e Celular, Programa de Pós-Graduação em Ciências da Saúde, Unidade de Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000 Criciúma, SC, Brazil
| | - Vanessa M Andrade
- Laboratório de Biologia Molecular e Celular, Programa de Pós-Graduação em Ciências da Saúde, Unidade de Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000 Criciúma, SC, Brazil
| | - Paulo C L Silveira
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Unidade de Ciências da Saúde, Universidade do Extremo Sul Catarinense, 88806-000 Criciúma, SC, Brazil
| | - Renata T Nesi
- Laboratório de Bioquímica do Exercício em Saúde, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Rua Imaculada Conceição, 155, Pontifícia Universidade Católica do Paraná, 80215-901 Curitiba, PR, Brazil
| | - Marcos M S Paula
- Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Universidade Federal do Amazonas, 69077-000 Manaus, AM, Brazil
| | - Ricardo A Pinho
- Laboratório de Bioquímica do Exercício em Saúde, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Rua Imaculada Conceição, 155, Pontifícia Universidade Católica do Paraná, 80215-901 Curitiba, PR, Brazil
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59
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Wei J, Rodríguez-Kessler PL, Halet JF, Kahlal S, Saillard JY, Muñoz-Castro A. On Heteronuclear Isoelectronic Alternatives to [Au13(dppe)5Cl2]3+: Electronic and Optical Properties of the 18-Electron Os@[Au12(dppe)5Cl2] Cluster from Relativistic Density Functional Theory Computations. Inorg Chem 2021; 60:8173-8180. [DOI: 10.1021/acs.inorgchem.1c00799] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jianyu Wei
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR) − UMR 6226, Rennes F-35000, France
| | - Peter L. Rodríguez-Kessler
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingenieria, Universidad Autonoma de Chile, El Llano Subercaseaux 2801, Santiago 8320000, Chile
| | - Jean-François Halet
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR) − UMR 6226, Rennes F-35000, France
- CNRS-Saint Gobain-NIMS, IRL 3629, Laboratory for Innovative Key Materials and Structures (LINK), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
| | - Samia Kahlal
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR) − UMR 6226, Rennes F-35000, France
| | - Jean-Yves Saillard
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR) − UMR 6226, Rennes F-35000, France
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingenieria, Universidad Autonoma de Chile, El Llano Subercaseaux 2801, Santiago 8320000, Chile
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60
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Zucchiatti P, Birarda G, Cerea A, Semrau MS, Hubarevich A, Storici P, De Angelis F, Toma A, Vaccari L. Binding of tyrosine kinase inhibitor to epidermal growth factor receptor: surface-enhanced infrared absorption microscopy reveals subtle protein secondary structure variations. NANOSCALE 2021; 13:7667-7677. [PMID: 33928964 DOI: 10.1039/d0nr09200b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surface-Enhanced Infrared Absorption (SEIRA) has been proposed as a valuable tool for protein binding studies, but its performances have been often proven on model proteins undergoing severe secondary structure rearrangements, while ligand binding only marginally involves the protein backbone in the vast majority of the biologically relevant cases. In this study we demonstrate the potential of SEIRA microscopy for highlighting the very subtle secondary structure modifications associated with the binding of Lapatinib, a tyrosine kinase inhibitor (TKI), to epidermal growth factor receptor (EGFR), a well-known driver of tumorigenesis in pathological settings such as lung, breast and brain cancers. By boosting the performances of Mid-IR plasmonic devices based on nanoantennas cross-geometry, accustoming the protein purification protocols, carefully tuning the protein anchoring methodology and optimizing the data analysis, we were able to detect EGFR secondary structure modification associated with few amino acids. A nano-patterned platform with this kind of sensitivity bridges biophysical and structural characterization methods, thus opening new possibilities in studying of proteins of biomedical interest, particularly for drug-screening purposes.
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Affiliation(s)
- Paolo Zucchiatti
- Elettra Sincrotrone Trieste SCpA, S.S. 14 Km 163.5, I-34149, Basovizza, Trieste, Italy. and Universtà degli studi di Trieste, Dipartimento di Fisica, via Valerio 2, I-34127, Trieste, Italy
| | - Giovanni Birarda
- Elettra Sincrotrone Trieste SCpA, S.S. 14 Km 163.5, I-34149, Basovizza, Trieste, Italy.
| | - Andrea Cerea
- Istituto Italiano di Tecnologia, Via Morego 30, I-16163, Genova, Italy
| | - Marta S Semrau
- Elettra Sincrotrone Trieste SCpA, S.S. 14 Km 163.5, I-34149, Basovizza, Trieste, Italy.
| | | | - Paola Storici
- Elettra Sincrotrone Trieste SCpA, S.S. 14 Km 163.5, I-34149, Basovizza, Trieste, Italy.
| | | | - Andrea Toma
- Istituto Italiano di Tecnologia, Via Morego 30, I-16163, Genova, Italy
| | - Lisa Vaccari
- Elettra Sincrotrone Trieste SCpA, S.S. 14 Km 163.5, I-34149, Basovizza, Trieste, Italy.
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61
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Domínguez-Castro A, Lien-Medrano CR, Maghrebi K, Messaoudi S, Frauenheim T, Fihey A. Photoinduced charge-transfer in chromophore-labeled gold nanoclusters: quantum evidence of the critical role of ligands and vibronic couplings. NANOSCALE 2021; 13:6786-6797. [PMID: 33690747 DOI: 10.1039/d1nr00213a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The electron flow between a metallic aggregate and an organic molecule after excitation with light is a crucial step on which hybrid photovoltaic nanomaterials are based. So far, designing such devices with the help of theoretical approaches has been heavily limited by the computational cost of quantum dynamics models able to track the evolution of the excited states over time. In this article, we present the first application of the time-dependent density functional tight-binding (TD-DFTB) method for an experimental nanometer-sized gold-organic system consisting of a hexyl-protected Au25 cluster labelled with a pyrene fluorophore, in which the fluorescence quenching of the pyrene is attributed to the electron transfer from the metallic cluster to the dye. The full quantum rationalization of the electron transfer is attained through quantum dynamics simulations, highlighting the crucial role of the protecting ligand shell in electron transfer, as well as the coupling with nuclear movement. This work paves the way towards the fast and accurate theoretical design of optoelectronic nanodevices.
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62
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The Role of Polymeric Coatings for a Safe-by-Design Development of Biomedical Gold Nanoparticles Assessed in Zebrafish Embryo. NANOMATERIALS 2021; 11:nano11041004. [PMID: 33919768 PMCID: PMC8070688 DOI: 10.3390/nano11041004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 12/12/2022]
Abstract
In the biomedical field, gold nanoparticles (GNPs) have attracted the attention of the scientific community thanks to their high potential in both diagnostic and therapeutic applications. The extensive use of GNPs led researchers to investigate their toxicity, identifying stability, size, shape, and surface charge as key properties determining their impact on biological systems, with possible strategies defined to reduce it according to a Safe-by-Design (SbD) approach. The purpose of the present work was to analyze the toxicity of GNPs of various sizes and with different coating polymers on the developing vertebrate model, zebrafish. In particular, increasing concentrations (from 0.001 to 1 nM) of 6 or 15 nm poly-(isobutylene-alt-maleic anhydride)-graft-dodecyl polymer (PMA)- or polyethylene glycol (PEG)-coated GNPs were tested on zebrafish embryos using the fish embryo test (FET). While GNP@PMA did not exert significant toxicity on zebrafish embryos, GNP@PEG induced a significant inhibition of embryo viability, a delay of hatching (with the smaller size NPs), and a higher incidence of malformations, in terms of tail morphology and eye development. Transmission electron microscope analysis evidenced that the more negatively charged GNP@PMA was sequestered by the positive charges of chorion proteins, with a consequent reduction in the amount of NPs able to reach the developing embryo and exert toxicological activity. The mild toxic response observed on embryos directly exposed to GNP@PMA suggest that these NPs are promising in terms of SbD development of gold-based biomedical nanodevices. On the other hand, the almost neutral GNP@PEG, which did not interact with the chorion surface and was free to cross chorion pores, significantly impacted the developing zebrafish. The present study raises concerns about the safety of PEGylated gold nanoparticles and contributes to the debated issue of the free use of this nanotool in medicine and nano-biotechnologies.
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63
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Wang Y, Bürgi T. Ligand exchange reactions on thiolate-protected gold nanoclusters. NANOSCALE ADVANCES 2021; 3:2710-2727. [PMID: 34046556 PMCID: PMC8130898 DOI: 10.1039/d1na00178g] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/02/2021] [Indexed: 05/08/2023]
Abstract
As a versatile post-synthesis modification method, ligand exchange reaction exhibits great potential to extend the space of accessible nanoclusters. In this review, we summarized this process for thiolate-protected gold nanoclusters. In order to better understand this reaction we will first provide the necessary background on the synthesis and structure of various gold clusters, such as Au25(SR)18, Au38(SR)24, and Au102(SR)44. The previous investigations illustrated that ligand exchange is enabled by the chemical properties and flexible gold-sulfur interface of nanoclusters. It is generally believed that ligand exchange follows a SN2-like mechanism, which is supported both by experiments and calculations. More interesting, several studies show that ligand exchange takes place at preferred sites, i.e. thiolate groups -SR, on the ligand shell of nanoclusters. With the help of ligand exchange reactions many functionalities could be imparted to gold nanoclusters including the introduced of chirality to achiral nanoclusters, size transformation and phase transfer of nanoclusters, and the addition of fluorescence or biological labels. Ligand exchange was also used to amplify the enantiomeric excess of an intrinsically chiral cluster. Ligand exchange reaction accelerates the prosperity of the nanocluster field, and also extends the diversity of precise nanoclusters.
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Affiliation(s)
- Yanan Wang
- Department of Physical Chemistry, University of Geneva 30 Quai Ernest-Ansermet 1211 Geneva 4 Switzerland
| | - Thomas Bürgi
- Department of Physical Chemistry, University of Geneva 30 Quai Ernest-Ansermet 1211 Geneva 4 Switzerland
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64
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Guntnur RT, Muzzio N, Morales M, Romero G. Phase transition characterization of poly(oligo(ethylene glycol)methyl ether methacrylate) brushes using the quartz crystal microbalance with dissipation. SOFT MATTER 2021; 17:2530-2538. [PMID: 33508060 PMCID: PMC7954969 DOI: 10.1039/d0sm02169e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Heterogeneous non-linear poly(ethylene glycol) analogs, like poly(oligo(ethylene glycol)methyl ether methacrylate) (POEGMA), are of particular interest in the fabrication of smart biocompatible coatings as they undergo a reversible macromolecular rearrangement in response to external heat stimuli. The phase transition dynamics of POEGMA coatings in response to external temperature stimuli have been poorly investigated. The quartz crystal microbalance with dissipation (QCM-D) can be used to investigate the phase transition of these functional coatings as polymer brushes in a dynamic and noninvasive in situ measurement. POEGMA brushes with different thickness are synthesized from the surface of a QCM-D sensor following a living radical polymerization technique by varying the monomer molecular weight. Investigations on the thermoresponsive collapse and swelling of POEGMA brushes grafted from the surface of a QCM-D sensor reveal the reversible phase transition nature of these coatings. Furthermore, the potential of these smart coatings in the field of biotechnology was explored by investigating the absorption and desorption of a model drug. A pulsatile drug release profile triggered by an increase in temperature is observed from POEGMA brushes. POEGMA brushes have the potential to be utilized as polymer coatings for controlled and programable drug release.
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Affiliation(s)
- Rohini Thevi Guntnur
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, USA.
| | - Nicolas Muzzio
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, USA.
| | - Madison Morales
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, USA.
| | - Gabriela Romero
- Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, USA.
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65
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Coughlin EE, Hu J, Lee A, Odom TW. Light-Mediated Directed Placement of Different DNA Sequences on Single Gold Nanoparticles. J Am Chem Soc 2021; 143:3671-3676. [DOI: 10.1021/jacs.0c11699] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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66
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Pem B, Toma M, Vrček V, Vinković Vrček I. Combined NMR and Computational Study of Cysteine Oxidation during Nucleation of Metallic Clusters in Biological Systems. Inorg Chem 2021; 60:4144-4161. [PMID: 33657797 DOI: 10.1021/acs.inorgchem.1c00321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The widespread biomedical applications of silver and gold nanoparticles (AgNPs and AuNPs, respectively) prompt the need for mechanistic evaluation of their interaction with biomolecules. In biological media, metallic NPs are known to transform by various pathways, especially in the presence of thiols. The interplay between metallic NPs and thiols may lead to unpredictable consequences for the health status of an organism. This study explored the potential events occurring during biotransformation, dissolution, and reformation of NPs in the thiol-rich biological media. The study employed a model system evaluating the interaction of cysteine with small-sized AgNPs and AuNPs. The interplay of cysteine on transformation and reformation pathways of these NPs was experimentally investigated by nuclear magnetic resonance (NMR) spectroscopy and supported by light scattering techniques and transmission electron microscopy (TEM). As the main outcome, Ag- or Au-catalyzed oxidation of cysteine to cystine was found to occur through generation of reactive oxygen species (ROS). Computational simulations confirmed this mechanism and the role of ROS in the oxidative dimerization of biothiol during NPs reformation. The obtained results represent valuable mechanistic data about the complex events during the transport of metallic NPs in thiol-rich biological systems that should be considered for the future biomedical applications of metal-based nanomaterials.
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Affiliation(s)
- Barbara Pem
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000 Zagreb, Croatia
| | - Mateja Toma
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Valerije Vrček
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Ivana Vinković Vrček
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000 Zagreb, Croatia
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67
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Tek G, Hamm P. Transient CO desorption from thin Pt films induced by mid-IR pumping. J Chem Phys 2021; 154:084706. [PMID: 33639777 DOI: 10.1063/5.0041216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Resonant and off-resonant mid-infrared pump-probe spectroscopy is used to measure the vibrational dynamics of CO adsorbed to thin (0.2 nm, 2 nm, and 10 nm) heterogeneous Pt layers in an aqueous solution. The transient signals observed with resonant pumping are dominated by vibrational relaxation of the CO internal stretch vibration with a lifetime of T1 ∼ 3 ps in all cases. Off-resonant pumping suppresses that contribution to the signal and singles out a signal, which is attributed to heating of the metal layer as well as transient desorption of the CO molecules. Due to the small photon energy (0.2 eV) used as pump pulses, the mechanism of desorption must be thermal, in which case the desorption yield depends exclusively on the fluence of absorbed light and not its wavelength. The thin Pt layers facilitate CO desorption, despite a relatively low pump pulse fluence, as they concentrate the absorbed energy in a small volume.
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Affiliation(s)
- Gökçen Tek
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Peter Hamm
- Department of Chemistry, University of Zurich, Zurich, Switzerland
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68
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Fan Y, Liu S, Yi Y, Rong H, Zhang J. Catalytic Nanomaterials toward Atomic Levels for Biomedical Applications: From Metal Clusters to Single-Atom Catalysts. ACS NANO 2021; 15:2005-2037. [PMID: 33566564 DOI: 10.1021/acsnano.0c06962] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Single-atom catalysts (SACs) featuring the complete atomic utilization of metal, high-efficient catalytic activity, superior selectivity, and excellent stability have been emerged as a frontier in the catalytic field. Recently, increasing interests have been drawn to apply SACs in biomedical fields for enzyme-mimic catalysis and disease therapy. To fulfill the demand of precision and personalized medicine, precisely engineering the structure and active site toward atomic levels is a trend for nanomedicines, promoting the evolution of metal-based biomedical nanomaterials, particularly biocatalytic nanomaterials, from nanoparticles to clusters and now to SACs. This review outlines the syntheses, characterizations, and catalytic mechanisms of metal clusters and SACs, with a focus on their biomedical applications including biosensing, antibacterial therapy, and cancer therapy, as well as an emphasis on their in vivo biological safeties. Challenges and future perspectives are ultimately prospected for SACs in diverse biomedical applications.
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Affiliation(s)
- Yu Fan
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Shange Liu
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Yu Yi
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China
| | - Hongpan Rong
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jiatao Zhang
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
- School of Chemistry & Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
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69
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Liu Z, Li Y, Shin W, Jin R. Observation of Core Phonon in Electron-Phonon Coupling in Au 25 Nanoclusters. J Phys Chem Lett 2021; 12:1690-1695. [PMID: 33560861 DOI: 10.1021/acs.jpclett.1c00050] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Temperature-dependent optical properties are of paramount importance for fundamentally understanding the electron-phonon interactions and phonon modes in atomically precise nanocluster materials. In this work, low-temperature optical absorption spectra of the icosahedral [Au25(SR)18]- nanocluster are measured from room temperature down to liquid helium temperature by adopting a thin-film-based technique. The thin-film measurement is further compared with results from the previous solution-based method. Interestingly, the previously missing core phonon is revealed by a quantitative analysis of the film data through peak deconvolution and fitting of the temperature trend with a theoretical model. The two lowest-energy absorption peaks (at 1.6 and 1.8 eV) of Au25 are determined to couple with the staple-shell phonon (average energy ∼350 cm-1) in the solution state, but in the solid state these electronic transitions couple with the core phonon (average energy ∼180 cm-1). The suppression of the staple-shell phonon in the solid state is attributed to the intracluster and cluster-matrix interactions.
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Affiliation(s)
- Zhongyu Liu
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Yingwei Li
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Wonyong Shin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Rongchao Jin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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70
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Zheng X, Wang J, Rao J. The Chemistry in Surface Functionalization of Nanoparticles for Molecular Imaging. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00021-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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71
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Pillay MN, van Zyl WE, Liu CW. A construction guide for high-nuclearity (≥50 metal atoms) coinage metal clusters at the nanoscale: bridging molecular precise constructs with the bulk material phase. NANOSCALE 2020; 12:24331-24348. [PMID: 33300525 DOI: 10.1039/d0nr05632d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Synthesis remains a major strength in chemistry and materials science and relies on the formation of new molecules and diverse forms of matter. The construction and identification of large molecules poses specific challenges and has historically lain in the realm of biological (organic)-type molecules with evolved synthesis methods to support such endeavours. But with the development of analytical tools such as X-ray crystallography, new synthesis methods toward large metal-based (inorganic) molecules and clusters have come to the fore, making it possible to accurately determine the precise distribution of hundreds of atoms in large clusters. In this review, we focus on different synthesis protocols used to form new metal clusters such as templating, alloying and size-focusing strategies. A specific focus is on group 11 metals (Cu, Ag, Au) as they currently predominate large metal cluster investigations and related Au and Ag bulk surface phenomena. This review focuses on metal clusters that have very high-nuclearity, i.e. with 50 or more metal centers within the isolated cluster. This size domain, it is believed, will become increasingly important for a variety of applications as these metal clusters are positioned at the interface between the molecular and bulk phases, whilst remaining a classic nanomaterial and retaining unique nano-sized properties.
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Affiliation(s)
- Michael N Pillay
- School of Chemistry and Physics, University of KwaZulu Natal, Westville Campus, Durban 4000, South Africa.
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72
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de Oliveira FC, Khani S, Maia JM, Tavares FW. Modified clustering algorithm for molecular simulation. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1839661] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Fellipe C. de Oliveira
- Instituto Alberto Luiz Coimbra de Pós-Graduaç ao e Pesquisa de Engenharia, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Shaghayegh Khani
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - João M. Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Frederico W. Tavares
- Instituto Alberto Luiz Coimbra de Pós-Graduaç ao e Pesquisa de Engenharia, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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73
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Joshi K, Krishnamurty S, Dar MA. Surface functionalization: an efficient alternative for promoting the catalytic activity of closed shell gold clusters. Phys Chem Chem Phys 2020; 22:23351-23359. [PMID: 33043944 DOI: 10.1039/d0cp01918f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Surface functionalization through adsorption of ligands or non-metal atoms is considered to be an interesting and viable approach for tuning the physicochemical properties of gold clusters. Highly stable and magic numbered electronic configurations of thiolate protected gold clusters such as Au25(SR)18, Au38(SR)24etc. with intriguing properties are the direct manifestation of the rich chemistry of the Au-S interface. The present investigation discerns the CO oxidation activity of structurally well characterized sulphur functionalized gold cluster anions AumS4-, m = 6-10. To establish an in-depth understanding, their activities are analyzed and compared with the corresponding pristine gold clusters. It is seen that sulphur functionalization irrespective of a closed or open shell nature leads to a significant decrease in the O2 adsorption energies on the anionic gold clusters. However, in sharp contrast to O2 adsorption, surface functionalization gives rise to multifarious catalytic behavior in AumS4- clusters with catalytic activity ranging from low (for Au6S4-, Au8S4-) to moderate (for Au9S4-, Au10S4-) to very high (for Au7S4-) for CO oxidation. It is interesting to note that the closed shell Au7S4- and Au9S4- clusters with poor O2 adsorption show remarkably low activation barriers and enhanced catalytic activity as compared to the open shell AumS4- clusters with an odd number of electrons. In particular, in the case of Au7S4- the lowest activation energy barriers of 0.01 and 0.21 eV are obtained, making the CO oxidation reaction facile. Moreover, ab initio molecular dynamics are performed to confirm the enhanced catalytic behaviour of Au7S4- and its dynamical stability during the desorption of CO2 molecule from its surface.
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Affiliation(s)
- Krati Joshi
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630 006, India
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74
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Nanofabrication Techniques in Large-Area Molecular Electronic Devices. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10176064] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The societal impact of the electronics industry is enormous—not to mention how this industry impinges on the global economy. The foreseen limits of the current technology—technical, economic, and sustainability issues—open the door to the search for successor technologies. In this context, molecular electronics has emerged as a promising candidate that, at least in the short-term, will not likely replace our silicon-based electronics, but improve its performance through a nascent hybrid technology. Such technology will take advantage of both the small dimensions of the molecules and new functionalities resulting from the quantum effects that govern the properties at the molecular scale. An optimization of interface engineering and integration of molecules to form densely integrated individually addressable arrays of molecules are two crucial aspects in the molecular electronics field. These challenges should be met to establish the bridge between organic functional materials and hard electronics required for the incorporation of such hybrid technology in the market. In this review, the most advanced methods for fabricating large-area molecular electronic devices are presented, highlighting their advantages and limitations. Special emphasis is focused on bottom-up methodologies for the fabrication of well-ordered and tightly-packed monolayers onto the bottom electrode, followed by a description of the top-contact deposition methods so far used.
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75
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Junghoefer T, Nowik-Boltyk EM, de Sousa JA, Giangrisostomi E, Ovsyannikov R, Chassé T, Veciana J, Mas-Torrent M, Rovira C, Crivillers N, Casu MB. Stability of radical-functionalized gold surfaces by self-assembly and on-surface chemistry. Chem Sci 2020; 11:9162-9172. [PMID: 34123165 PMCID: PMC8163401 DOI: 10.1039/d0sc03399e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/10/2020] [Indexed: 11/23/2022] Open
Abstract
We have investigated the radical functionalization of gold surfaces with a derivative of the perchlorotriphenylmethyl (PTM) radical using two methods: by chemisorption from the radical solution and by on-surface chemical derivation from a precursor. We have investigated the obtained self-assembled monolayers by photon-energy dependent X-ray photoelectron spectroscopy. Our results show that the molecules were successfully anchored on the surfaces. We have used a robust method that can be applied to a variety of materials to assess the stability of the functionalized interface. The monolayers are characterized by air and X-ray beam stability unprecedented for films of organic radicals. Over very long X-ray beam exposure we observed a dynamic nature of the radical-Au complex. The results clearly indicate that (mono)layers of PTM radical derivatives have the necessary stability to withstand device applications.
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Affiliation(s)
- Tobias Junghoefer
- Institute of Physical and Theoretical Chemistry, University of Tübingen 72076 Tübingen Germany
| | | | - J Alejandro de Sousa
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) Campus de la UAB 08193 Bellaterra Spain
- Laboratorio de Electroquímica, Departamento de Química, Facultad de Ciencias, Universidad de los Andes 5101 Mérida Venezuela
| | | | - Ruslan Ovsyannikov
- Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) 12489 Berlin Germany
| | - Thomas Chassé
- Institute of Physical and Theoretical Chemistry, University of Tübingen 72076 Tübingen Germany
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) Campus de la UAB 08193 Bellaterra Spain
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) Campus de la UAB 08193 Bellaterra Spain
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) Campus de la UAB 08193 Bellaterra Spain
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) Campus de la UAB 08193 Bellaterra Spain
| | - Maria Benedetta Casu
- Institute of Physical and Theoretical Chemistry, University of Tübingen 72076 Tübingen Germany
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76
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Paiva FL, Secchi AR, Calado V, Maia J, Khani S. Slip and momentum transfer mechanisms mediated by Janus rods at polymer interfaces. SOFT MATTER 2020; 16:6662-6672. [PMID: 32626867 DOI: 10.1039/d0sm00858c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
As an incipient but preeminent technology for multiphase nanomaterials/fluids, exact compatibilizing mechanisms of Janus particles in polymer blends and the consequent morphology remain unknown. The contributions of Janus nanorods to slip suppression and momentum transfer across the interface have been explored through dissipative particle dynamics simulations under shear flow at unentangled polymer-polymer interfaces. Rods have been then grafted with flexible polymer chains to unveil interfacial structure-property relationships at a molecular level when compared with flexible diblock copolymer surfactants. When Janus rods are sparsely grafted with necessarily longer grafts, they favor a greater degree of graft interpenetration with polymer phases. This yields less effective momentum transfer that impacts droplet coalescence processes; dynamic heterogeneities at complex interfaces; and helps map their efficiency as compatibilizers.
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Affiliation(s)
- Felipe L Paiva
- School of Chemistry, Universidade Federal do Rio de Janeiro, Rua Horácio Macedo 2030, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil and Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA.
| | - Argimiro R Secchi
- Chemical Engineering Graduate Program (COPPE), Universidade Federal do Rio de Janeiro, Rua Horácio Macedo 2030, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil
| | - Verônica Calado
- School of Chemistry, Universidade Federal do Rio de Janeiro, Rua Horácio Macedo 2030, Cidade Universitária, Rio de Janeiro, RJ 21941-909, Brazil
| | - João Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA.
| | - Shaghayegh Khani
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA.
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77
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Pirzada M, Sehit E, Altintas Z. Cancer biomarker detection in human serum samples using nanoparticle decorated epitope-mediated hybrid MIP. Biosens Bioelectron 2020; 166:112464. [PMID: 32771854 DOI: 10.1016/j.bios.2020.112464] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/07/2020] [Accepted: 07/17/2020] [Indexed: 01/22/2023]
Abstract
The determination of disease-associated molecules at trace amounts is a key factor for early and efficient diagnosis from human body fluids. Herein, an ultrasensitive electrochemical sensor based on hybrid epitope imprinting and nanomaterial amplification was developed. The hybrid epitope imprinting was achieved by electropolymerization in the presence of two computationally selected and cysteine modified epitopes of neuron specific enolase (NSE), as-synthesized gold nanoparticles (AuNPs), and functional monomer. The AuNPs decorated epitope-mediated hybrid MIPs, as well as the standard hybrid MIPs, were utilized for the preparation of electrochemical sensors to demonstrate the impact of nanomaterial's modification in the polymer network for biomarker sensing. The fabrication process of both sensor types was investigated by employing cyclic voltammetry, square wave voltammetry, atomic force microscopy, and scanning electron microscopy. The biomarker assay using the standard hybrid MIPs resulted in 2.5-fold higher sensitivity compared to single epitope imprints, whereas the AuNP-hybrid MIPs enhanced the sensitivity level to a great extent and allowed the recognition of NSE in human serum in a concentration range of 25-4000 pg/mL. Comparative selectivity studies with non-imprinted polymer resulted in an imprinting factor of 4.2, confirming the high target selectivity of AuNP-MIP cavities. Cross-reaction of the sensor with four reference molecules (dopamine, bovine serum albumin, glucose and elongated peptide) was negligible. As compared to current strategies for epitope imprinting which rely on single epitopes for the formation of molecular cavities, the hybrid epitope-MIPs, particularly with the inclusion of AuNPs have provided more desirable sensing platforms with high sensitivity, affinity and specificity.
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Affiliation(s)
- Muqsit Pirzada
- Technical University of Berlin, Straße des 17. Juni 124, Berlin, 10623, Germany
| | - Ekin Sehit
- Technical University of Berlin, Straße des 17. Juni 124, Berlin, 10623, Germany
| | - Zeynep Altintas
- Technical University of Berlin, Straße des 17. Juni 124, Berlin, 10623, Germany.
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78
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Galati E, Tao H, Rossner C, Zhulina EB, Kumacheva E. Morphological Transitions in Patchy Nanoparticles. ACS NANO 2020; 14:4577-4584. [PMID: 32176471 DOI: 10.1021/acsnano.0c00108] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanoparticles (NPs) decorated with topographically or chemically distinct surface patches are an emerging class of colloidal building blocks of functional hierarchical materials. Surface segregation of polymer ligands into pinned micelles offers a strategy for the generation of patchy NPs with controlled spatial distribution and number of patches. The thermodynamic nature of this approach poses a question about the stability of multiple patches on the NP surface, as the lowest energy state is expected for NPs carrying a single patch. In the present work, for gold NPs end-grafted with thiol-terminated polymer molecules, we show that the patchy surface morphology is preserved under conditions of strong grafting of the thiol groups to the NP surface (i.e., up to a temperature of 40 °C), although the patch shape changes over time. At higher temperatures (e.g., at 80 °C), the number of patches per NP decreases, due to the increased lateral mobility and coalescence of the patches as well as the ultimate loss of the polymer ligands due to desorption at enhanced solvent quality. The experimental results were rationalized theoretically, using a scaling approach. The results of this work offer insight into the surface science of patchy nanocolloids and specify the time and temperature ranges of the applications of patchy NPs.
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Affiliation(s)
- Elizabeth Galati
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Huachen Tao
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Christian Rossner
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
- Leibniz-Institut für Polymerforschung Dresden e.V., Institut für Physikalische Chemie und Physik der Polymere, D-01069 Dresden, Germany
| | - Ekaterina B Zhulina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Saint Petersburg 199004, Russia
| | - Eugenia Kumacheva
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
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Zhou G, Liu C, Bumm LA, Huang L. Force Field Parameter Development for the Thiolate/Defective Au(111) Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4098-4107. [PMID: 32200638 DOI: 10.1021/acs.langmuir.0c00530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A molecular-level understanding of the interplay between self-assembled monolayers (SAMs) of thiolates and gold surface is of great importance to a wide range of applications in surface science and nanotechnology. Despite theoretical research progress of the past decade, an atomistic model, capable of describing key features of SAMs at reconstructed gold surfaces, is still missing. In this work, periodic ab initio density functional theory (DFT) calculations were utilized to develop a new atomistic force field model for alkanethiolate (AT) SAMs on a reconstructed Au(111) surface. The new force field parameters were carefully trained to reproduce the key features, including vibrational spectra and torsion energy profiles of ethylthiolate (C2S) in the bridge or staple motif model on the Au(111) surface, wherein, the force constants of the bond and angle terms were trained by matching the vibrational spectra, while the torsion parameters of the dihedral angles were trained via fitting the torsion energy profiles from DFT calculations. To validate the developed force field parameters, we performed classical molecular dynamics (MD) simulations for both pristine and reconstructed Au-S interface models with a (2√3 × 3) unit cell, which includes four dodecanethiolate (C10S) molecules on the Au(111) surface. The simulation results showed that the geometrical features of the investigated Au-S interface models and structural properties of the C10S SAMs are in good agreement with the ab initio MD studies. The newly developed atomistic force field model provides new fundamental insights into AT SAMs on the reconstructed Au(111) surface and adds advancement to the existing interface research knowledge.
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Affiliation(s)
- Guobing Zhou
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Chang Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Lloyd A Bumm
- Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Liangliang Huang
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
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80
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Quintana C, Cifuentes MP, Humphrey MG. Transition metal complex/gold nanoparticle hybrid materials. Chem Soc Rev 2020; 49:2316-2341. [PMID: 32149284 DOI: 10.1039/c9cs00651f] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Gold nanoparticles (AuNPs) are of considerable interest for diverse applications in areas such as medicine, catalysis, and sensing. AuNPs are generally surface-stabilized by organic matrices and coatings, and while the resultant organic compound (OC)/AuNP hybrids have been explored extensively, they are not suitable for certain applications (e.g. those necessitating reversible redox behaviour and/or long excited-state lifetimes), and they often suffer from low photo- and/or thermal stability. Transition metal complex (TMC)/AuNP hybrids have recently come to the fore as they circumvent some of the aforementioned shortcomings with OC/AuNP hybrids. This review summarizes progress thus far in the nascent field of TMC/AuNP hybrids. The structure and composition of extant TMC/AuNP hybrids are briefly reviewed and the range of TMCs employed in the shell of the hybrids are summarized, the one-phase, two-phase, and post-nanoparticle-synthesis synthetic methods to TMC/AuNP hybrids are discussed and contrasted, highlighting the advantages of variants of the last-mentioned procedure, and the utility of the various characterization techniques is discussed, emphasizing the need to employ multiple techniques in concert. Applications of TMC/AuNP hybrids in luminescence, electrochemical, and electro-optical sensing are described and critiqued, and their uses and potential in imaging, photo-dynamic therapy, nonlinear optics, and catalysis are assessed.
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Affiliation(s)
- Cristóbal Quintana
- Research School of Chemistry, Australian National University, Canberra ACT 2601, Australia.
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81
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First principle approach to elucidate transport properties through L-glutamic acid-based molecular devices using symmetrical electrodes. J Mol Model 2020; 26:74. [PMID: 32146585 DOI: 10.1007/s00894-020-4323-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 02/23/2020] [Indexed: 10/24/2022]
Abstract
Protein-based electronics is one of the emerging technology in which inventive electronic devices are being adduced and developed based on the selective actions of specific proteins. The explicit actions can be predicted if the building blocks of proteins (i.e., amino acids) are studied decorously. We emphasize our work on electronic transport properties of L-glutamic acid (i.e., L-amino acid) stringed to gold, silver, and copper electrodes, respectively, to form three distinct devices. For our calculations, we employ NEGF-DFT approach using self-consistent function. Electronic coupling and tunneling barriers between the molecule and the electrodes have been emphasized with an inception of delocalization of molecular orbitals within the device. We observe strong correlation between tunneling barrier and Mulliken charge transfer between molecule and electrodes. The asymmetrical carbon chain (-CH2) within the molecule exhibits negative differential resistance (NDR) and rectification ratio. The device using molecule with copper electrodes exhibits the highest peak to valley current ratio of 1.84. The rectification ratio of the device with gold, silver, and copper electrodes is 2.35, 2.25, and 15.62, respectively, at finite bias. These results yield fresh insight on the potential of L-glutamic acid like bio-molecule in the emerging field of proteotronics.
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82
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Higgins SG, Becce M, Belessiotis-Richards A, Seong H, Sero JE, Stevens MM. High-Aspect-Ratio Nanostructured Surfaces as Biological Metamaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1903862. [PMID: 31944430 PMCID: PMC7610849 DOI: 10.1002/adma.201903862] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 10/02/2019] [Indexed: 04/14/2023]
Abstract
Materials patterned with high-aspect-ratio nanostructures have features on similar length scales to cellular components. These surfaces are an extreme topography on the cellular level and have become useful tools for perturbing and sensing the cellular environment. Motivation comes from the ability of high-aspect-ratio nanostructures to deliver cargoes into cells and tissues, access the intracellular environment, and control cell behavior. These structures directly perturb cells' ability to sense and respond to external forces, influencing cell fate, and enabling new mechanistic studies. Through careful design of their nanoscale structure, these systems act as biological metamaterials, eliciting unusual biological responses. While predominantly used to interface eukaryotic cells, there is growing interest in nonanimal and prokaryotic cell interfacing. Both experimental and theoretical studies have attempted to develop a mechanistic understanding for the observed behaviors, predominantly focusing on the cell-nanostructure interface. This review considers how high-aspect-ratio nanostructured surfaces are used to both stimulate and sense biological systems.
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Affiliation(s)
- Stuart G. Higgins
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
| | | | | | - Hyejeong Seong
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
| | - Julia E. Sero
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
| | - Molly M. Stevens
- Department of Materials, Imperial College London, London, SW7 2AZ, UK
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
- Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
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83
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Antoine R. Supramolecular Gold Chemistry: From Atomically Precise Thiolate-Protected Gold Nanoclusters to Gold-Thiolate Nanostructures. NANOMATERIALS 2020; 10:nano10020377. [PMID: 32098101 PMCID: PMC7075309 DOI: 10.3390/nano10020377] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 12/17/2022]
Abstract
Supramolecular chemistry is defined as chemistry beyond the molecule [...].
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Affiliation(s)
- Rodolphe Antoine
- Institut Lumière Matière UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon, F-69100 Villeurbanne, France
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84
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Kang S, Gil YG, Kim YJ, Kim YK, Min DH, Jang H. Environmentally Friendly Synthesis of Au-Te-Clustered Nanoworms via Galvanic Replacement for Wavelength-Selective Combination Cancer Therapy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:5511-5519. [PMID: 31918538 DOI: 10.1021/acsami.9b19862] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Au-Te-clustered nanoworms (AuTeNWs) were successfully synthesized under ambient conditions by spontaneous galvanic replacement using Te nanorods as a sacrificial nanotemplate. Along with the gradual replacement and on-surface crystalline Au cluster formation, Te nanotemplates were transformed into a serpentine nanoworm-like morphology. The present strategy was an environmentally friendly method that did not use surfactants to control the surface structure. The synthesized nanoworms exhibited excellent photothermal conversion, photocatalytic efficiencies, and high payloads for thiolated genes and cell-penetrating peptides. According to the visible and near-infrared wavelengths of light, the photodynamic and photothermal therapeutic pathways were dominantly acting, respectively. From this, wavelength-selective combination treatment with gene therapy was successfully accomplished. Taken together, excellent therapeutic effects for in vitro and in vivo mouse models against hepatitis C replicon human hepatocarcinoma were clearly identified by using the present AuTeNWs as a phototherapeutic nanocarrier.
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Affiliation(s)
- Seounghun Kang
- Department of Chemistry , Seoul National University , Seoul 08826 , Republic of Korea
| | - Yeong-Gyu Gil
- Department of Chemistry , Kwangwoon University , 20 Gwangwoon-ro , Nowon-gu, Seoul 01897 , Republic of Korea
| | - Young-Jin Kim
- Carbon Composite Materials Research Center, Institute of Advanced Composite Materials , Korea Institute of Science and Technology , San 101 , Eunha-ri, Bongdong-eup, Wanju-gun , Jeollabuk-do 565-905 , Republic of Korea
| | - Young-Kwan Kim
- Carbon Composite Materials Research Center, Institute of Advanced Composite Materials , Korea Institute of Science and Technology , San 101 , Eunha-ri, Bongdong-eup, Wanju-gun , Jeollabuk-do 565-905 , Republic of Korea
| | - Dal-Hee Min
- Department of Chemistry , Seoul National University , Seoul 08826 , Republic of Korea
- Center for RNA Research, Institute for Basic Science (IBS) , Seoul National University , Seoul 08826 , Republic of Korea
- Institute of Biotherapeutics Convergence Technology , Lemonex Inc. , Seoul 08826 , Republic of Korea
| | - Hongje Jang
- Department of Chemistry , Kwangwoon University , 20 Gwangwoon-ro , Nowon-gu, Seoul 01897 , Republic of Korea
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85
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Sun C, Liao X, Huang P, Shan G, Ma X, Fu L, Zhou L, Kong W. A self-assembled electrochemical immunosensor for ultra-sensitive detection of ochratoxin A in medicinal and edible malt. Food Chem 2020; 315:126289. [PMID: 32014670 DOI: 10.1016/j.foodchem.2020.126289] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 09/25/2019] [Accepted: 01/22/2020] [Indexed: 02/07/2023]
Abstract
Trace residue of mycotoxins in complex medicinal and edible food matrices has brought huge challenges for the development of ultrasensitive analytical methods. Here, a green electrochemical immunosensor for the ultrasensitive detection of ochratoxin A (OTA) was fabricated by self-assembling a compact 2-mercaptoacetic (TGA) monolayer on the surface of the working Au electrode to form the Au/TGA/bovine serum aibumin (BSA)-OTA/anti-OTA monoclonal antibody composite probes for selective and ultra-sensitive detection of OTA based on indirect competitive principle and differential pulse voltammetry analysis. The electrochemical impedance spectroscopy and cyclic voltammetry methods were introduced to characterize the assemble situation of the TGA-modified Au electrode and optimize some critical parameters for the green electrochemical immunoseonsor. Under the optimal conditions, the developed immunosensor exhibited much lower limit of detection (0.08 ng/mL) in the range of 0.1-1.0 ng/mL for OTA compared with other direct or disposable electrochemical immunosensors. Real application in the spiked malt samples verified high accuracy with no matrix interferences of the proposed immunoseonsor. This is a meaningful study on a self-assembled electrochemical immunoseonsor for ultra-sensitive and rapid detection of OTA in malt samples, which suggested a general simple-to-use sensing platform and prospect as an economical and green tool for ultra-sensitive detection of much more trace-level of toxic small molecules in other complex matrices to ensure their quality and safety.
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Affiliation(s)
- Chaonan Sun
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Xiaofang Liao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Pinxuan Huang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Guangzhi Shan
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xiao Ma
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Lizhu Fu
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Lidong Zhou
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
| | - Weijun Kong
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
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86
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Jandas PJ, Luo J, Quan A, Li C, Fu C, Fu YQ. Graphene oxide-Au nano particle coated quartz crystal microbalance biosensor for the real time analysis of carcinoembryonic antigen. RSC Adv 2020; 10:4118-4128. [PMID: 35492675 PMCID: PMC9049092 DOI: 10.1039/c9ra09963h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 12/24/2019] [Indexed: 12/13/2022] Open
Abstract
A label-free quartz crystal microbalance (QCM) biosensor was developed for the selective and real-time estimation of carcinoembryonic antigen (CEA) through the present study. Graphene oxide-Au nanoparticles (GO-AuNPs) was in situ synthesised on the surface of the QCM electrode and the antibody of CEA (monoclonal anti-CEA from mouse) was covalently immobilized on this layer as the bioreceptor for CEA. Mercaptoacetic acid-EDC-NHS reaction mechanism was used for anti-CEA immobilization. The effect of oxygen plasma treatment of the QCM electrode surface before bioreceptor preparation on the performance of the biosensor was tested and was found promising. CEA solutions with various concentrations were analysed using the bioreceptors to estimate the sensitivity and detection limit of the biosensor. The biosensors selectively recognized and captured CEA biomolecules with a detection limit of 0.06 and 0.09 ng mL-1 of CEA for oxygen plasma-treated (E2) and untreated (E1) bioreceptors, respectively. The sensitivity was estimated at 102 and 79 Hz, respectively, for E2 and E1. Clinical serum samples were analysed and the results were found in good agreement with the ELISA analysis. Long term stability was also found to be excellent. Langmuir adsorption isotherm was also conducted using the experimental results.
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Affiliation(s)
- P J Jandas
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University 518060 Shenzhen PR China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University 518060 Shenzhen PR China
| | - Jingting Luo
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University 518060 Shenzhen PR China
| | - Aojie Quan
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University 518060 Shenzhen PR China
| | - Chong Li
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University 518060 Shenzhen PR China
| | - Chen Fu
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University 518060 Shenzhen PR China
| | - Y Q Fu
- Faculty of Engineering and Environment, Northumbria University Newcastle upon Tyne NE1 8ST UK
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87
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Yoshida H, Ehara M, Priyakumar UD, Kawai T, Nakashima T. Enantioseparation and chiral induction in Ag 29 nanoclusters with intrinsic chirality. Chem Sci 2020; 11:2394-2400. [PMID: 34084402 PMCID: PMC8157427 DOI: 10.1039/c9sc05299b] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The optical activity of a metal nanocluster (NC) is induced either by an asymmetric arrangement of constituents or by a dissymmetric field of a chiral ligand layer. Herein, we unveil the origin of chirality in Ag29 NCs, which is attributed to the intrinsically chiral atomic arrangement. The X-ray crystal structure of a Ag29(BDT)12(TPP)4 NC (BDT: 1,3-benzenedithiol; TPP: triphenylphosphine) manifested the presence of intrinsic chirality in the outer shell capping the icosahedral achiral Ag13 core. The enantiomers of the Ag29(BDT)12(TPP)4 NC are separated by high-performance liquid chromatography (HPLC) using a chiral column for the first time, showing mirror-image circular dichroism (CD) spectra. The CD spectra are reproduced by time-dependent density functional theory (TDDFT) calculations based on enantiomeric Ag29 models with achiral 1,3-propanedithiolate ligands. The mechanism of chiral induction in the synthesis of Ag29(DHLA)12 (DHLA: α-dihydrolipoic acid) NCs with a chiral ligand system is further discussed with the aid of DFT calculations. The use of the enantiomeric DHLA ligand preferentially leads to a one-handed atomic arrangement which is more stable than the opposite one, inducing the enantiomeric excess in the population of intrinsically chiral Ag29 NCs with CD activity. Enantioseparation of Ag29 nanoclusters with intrinsic chirality was performed by chiral HPLC, affording a pair of fractions with mirror image CD spectra.![]()
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Affiliation(s)
- Hiroto Yoshida
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST) Ikoma Nara 630-01921 Japan
| | - Masahiro Ehara
- Institute for Molecular Science, Research Center for Computational Science Myodai-ji Okazaki 444-8585 Japan
| | - U Deva Priyakumar
- Centre for Computational Natural Sciences and Bioinformatics, International Institute of Information Technology Hyderabad 500032 India
| | - Tsuyoshi Kawai
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST) Ikoma Nara 630-01921 Japan
| | - Takuya Nakashima
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST) Ikoma Nara 630-01921 Japan
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88
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Tao H, Chen L, Galati E, Manion JG, Seferos DS, Zhulina EB, Kumacheva E. Helicoidal Patterning of Gold Nanorods by Phase Separation in Mixed Polymer Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15872-15879. [PMID: 31402668 DOI: 10.1021/acs.langmuir.9b02001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The spatial distribution of polymer ligands on the surface of nanoparticles (NPs) is of great importance because it determines their interactions with each other and with the surrounding environment. Phase separation in mixtures of polymer brushes has been studied for spherical NPs; however, the role of local surface curvature of nonspherical NPs in the surface phase separation of end-grafted polymer ligands remains an open question. Here, we examined phase separation in mixed monolayers of incompatible polystyrene and poly(ethylene glycol) brushes end-capping the surface of gold nanorods in a good solvent. By varying the molar ratio between these polymers, we generated a range of surface patterns, including uniform and nonuniform polystyrene shells, randomly distributed polystyrene surface patches, and, most interestingly, a helicoidal pattern of polystyrene patches wrapping around the nanorods. The helicoidally patterned nanorods exhibited long-term colloidal stability in a good solvent. The helicoidal wrapping of the nanorods was achieved for the mixtures of polymers with different molecular weights and preserved when the quality of the solvent for the polymers was reduced. The helicoidal organization of polymer patches on the surface of nanorods can be used for templating the synthesis or self-assembly of helicoidal multicomponent nanomaterials.
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Affiliation(s)
- Huachen Tao
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 3H6 , Canada
| | - Linye Chen
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 3H6 , Canada
| | - Elizabeth Galati
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 3H6 , Canada
| | - Joseph G Manion
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 3H6 , Canada
| | - Dwight S Seferos
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 3H6 , Canada
- Department of Chemical Engineering and Applied Chemistry , University of Toronto , Toronto , Ontario M5S 3E5 , Canada
| | - Ekaterina B Zhulina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences , Saint Petersburg 199004 , Russian Federation
| | - Eugenia Kumacheva
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 3H6 , Canada
- Institute of Biomaterials and Biomedical Engineering , University of Toronto , Toronto , Ontario M5S 3G9 , Canada
- Department of Chemical Engineering and Applied Chemistry , University of Toronto , Toronto , Ontario M5S 3E5 , Canada
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89
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Mai L, Tran T, Bui Q, Nhac-Vu HT. A novel nanohybrid of gold nanoparticles anchored copper sulfide nanosheets as sensitive sensor for nonenzymatic glucose detection. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123936] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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90
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Heidary N, Kornienko N. Operando Raman probing of electrocatalytic biomass oxidation on gold nanoparticle surfaces. Chem Commun (Camb) 2019; 55:11996-11999. [PMID: 31531432 DOI: 10.1039/c9cc06646b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Electrocatalytic conversion of biomass-derived intermediates is a green route to value-added chemicals. However, this technology is just emerging and the mechanisms of this process are not fully resolved. Here, we present the first operando Raman spectroscopic investigation of 5-hydroxymethylfurfural oxidation on gold nanoparticle surfaces, opening up avenues for understanding such reactivity and for rational systems design.
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Affiliation(s)
- Nina Heidary
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec, H3C 3J7, Canada.
| | - Nikolay Kornienko
- Department of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec, H3C 3J7, Canada.
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91
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Althagafi II, Kassem MA, Awad MI. Enhanced Electrocatalytic Oxidation of Paracetamol at DNA Modified Gold Electrode. ELECTROANAL 2019. [DOI: 10.1002/elan.201900141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ismail I. Althagafi
- Chemistry Department, Faculty of Applied ScienceUmm Al-Qura University, Makkah Kingdom Saudi Arabia
| | - Mohammed A. Kassem
- Chemistry Department, Faculty of Applied ScienceUmm Al-Qura University, Makkah Kingdom Saudi Arabia
- Chemistry Department, Faculty of ScienceBenha University Benha 13518 Egypt
| | - Mohamed I. Awad
- Chemistry Department, Faculty of Applied ScienceUmm Al-Qura University, Makkah Kingdom Saudi Arabia
- Chemistry Department, Faculty of ScienceCairo University Cairo Egypt
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92
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Krishnadas KR, Natarajan G, Baksi A, Ghosh A, Khatun E, Pradeep T. Metal-Ligand Interface in the Chemical Reactions of Ligand-Protected Noble Metal Clusters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11243-11254. [PMID: 30521344 DOI: 10.1021/acs.langmuir.8b03493] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We discuss the role of the metal-ligand (M-L) interfaces in the chemistry of ligand-protected, atomically precise noble metal clusters, a new and expanding family of nanosystems, in solution as well as in the gas phase. A few possible mechanisms by which the structure and dynamics of M-L interfaces could trigger intercluster exchange reactions are presented first. How interparticle chemistry can be a potential mechanism of Ostwald ripening, a well-known particle coarsening process, is also discussed. The reaction of Ag59(2,5-DCBT)32 (DCBT = dichlorobenzenethiol) with 2,4-DCBT leading to the formation of Ag44(2,4-DCBT)30 is presented, demonstrating the influence of the ligand structure in ligand-induced chemical transformations of clusters. We also discuss the structural isomerism of clusters such as Ag44(SR)30 (-SR = alkyl/aryl thiolate) in the gas phase wherein the occurrence of isomerism is attributed to the structural rearrangements in the M-L bonding network. Interfacial bonding between Au25(SR)18 clusters leading to the formation of cluster dimers and trimers is also discussed. Finally, we show that the desorption of phosphine and hydride ligands on a silver cluster, [Ag18(TPP)10H16]2+ (TPP = triphenylphosphine) in the gas phase, leads to the formation of a naked silver cluster of precise nuclearity, such as Ag17+. We demonstrate that the nature of the M-L interfaces, i.e., the oxidation state of metal atoms, structure of the ligand, M-L bonding network, and so forth, plays a key role in the chemical reactivity of clusters. The structure, dynamics, and chemical reactivity of nanosystems in general are to be explored together to obtain new insights into their emerging science.
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Affiliation(s)
- Kumaranchira Ramankutty Krishnadas
- Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE) , Indian Institute of Technology Madras , Chennai 600 036 , India
| | - Ganapati Natarajan
- Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE) , Indian Institute of Technology Madras , Chennai 600 036 , India
| | - Ananya Baksi
- Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE) , Indian Institute of Technology Madras , Chennai 600 036 , India
| | - Atanu Ghosh
- Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE) , Indian Institute of Technology Madras , Chennai 600 036 , India
| | - Esma Khatun
- Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE) , Indian Institute of Technology Madras , Chennai 600 036 , India
| | - Thalappil Pradeep
- Department of Chemistry, DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE) , Indian Institute of Technology Madras , Chennai 600 036 , India
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93
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Mervinetsky E, Alshanski I, Buchwald J, Dianat A, Lončarić I, Lazić P, Crljen Ž, Gutierrez R, Cuniberti G, Hurevich M, Yitzchaik S. Direct Assembly and Metal-Ion Binding Properties of Oxytocin Monolayer on Gold Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11114-11122. [PMID: 31361147 DOI: 10.1021/acs.langmuir.9b01830] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Peptides are very common recognition entities that are usually attached to surfaces using multistep processes. These processes require modification of the native peptides and of the substrates. Using functional groups in native peptides for their assembly on surfaces without affecting their biological activity can facilitate the preparation of biosensors. Herein, we present a simple single-step formation of native oxytocin monolayer on gold surface. These surfaces were characterized by atomic force spectroscopy, spectroscopic ellipsometry, and X-ray photoelectron spectroscopy. We took advantage of the native disulfide bridge of the oxytocin for anchoring the peptide to the Au surface, while preserving the metal-ion binding properties. Self-assembled oxytocin monolayer was used by electrochemical impedance spectroscopy for metal-ion sensing leading to subnanomolar sensitivities for zinc or copper ions.
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Affiliation(s)
| | | | - Jörg Buchwald
- Institute for Materials Science and Max Bergmann Center of Biomaterials , Hallwachsstraße 3 , 01062 Dresden , Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials , Hallwachsstraße 3 , 01062 Dresden , Germany
| | - Ivor Lončarić
- Ruđer Bošković Institute , Bijenička cesta 54 , 10000 Zagreb , Croatia
| | - Predrag Lazić
- Ruđer Bošković Institute , Bijenička cesta 54 , 10000 Zagreb , Croatia
| | - Željko Crljen
- Ruđer Bošković Institute , Bijenička cesta 54 , 10000 Zagreb , Croatia
| | - Rafael Gutierrez
- Institute for Materials Science and Max Bergmann Center of Biomaterials , Hallwachsstraße 3 , 01062 Dresden , Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials , Hallwachsstraße 3 , 01062 Dresden , Germany
- Dresden Center for Computational Materials Science , TU Dresden , 01062 Dresden , Germany
- Center for Advancing Electronics Dresden , TU Dresden , 01062 Dresden , Germany
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94
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Lyu Y, Marafon G, Martínez Á, Moretto A, Scrimin P. Oligopeptide Helical Conformations Control Gold Nanoparticle Cross‐Linking. Chemistry 2019; 25:11758-11764. [DOI: 10.1002/chem.201902552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Yanchao Lyu
- Department of Chemical Sciences University of Padova Via Marzolo, 1 35131 Padova Italy
| | - Giulia Marafon
- Department of Chemical Sciences University of Padova Via Marzolo, 1 35131 Padova Italy
| | - Álvaro Martínez
- Department of Chemical Sciences University of Padova Via Marzolo, 1 35131 Padova Italy
- Current address: International Physics Center Paseo Manuel de Lardizabal 4 Donostia 20018 Spain
| | - Alessandro Moretto
- Department of Chemical Sciences University of Padova Via Marzolo, 1 35131 Padova Italy
| | - Paolo Scrimin
- Department of Chemical Sciences University of Padova Via Marzolo, 1 35131 Padova Italy
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95
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Chen QC, Xiao ZY, Fite S, Mizrahi A, Fridman N, Zhan X, Keisar O, Cohen Y, Gross Z. Tuning Chemical and Physical Properties of Phosphorus Corroles for Advanced Applications. Chemistry 2019; 25:11383-11388. [PMID: 31251414 DOI: 10.1002/chem.201902686] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Indexed: 12/13/2022]
Abstract
Although the affinity of metallocorroles to axial ligands is quite low, this is not the case when the chelated element is phosphorus. This work is hence focused on the mechanism of ligand exchange of six-coordinate phosphorus corroles as a tool for affecting their chemical and physical properties. These fundamental investigations allowed for the development of facile methodologies for the synthesis of a large series of complexes and the establishment of several new structure/activity profiles that may be used to understand and predict spectroscopic features and for tailor-made modification of photophysical and electrochemical properties. This is exemplified by the facile access to complexes with terminal groups that are of large potential for practical applications based on click chemistry, optical imaging, and surface science.
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Affiliation(s)
- Qiu-Cheng Chen
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
| | - Zi-Ye Xiao
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
| | - Shachar Fite
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
| | - Amir Mizrahi
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel.,Department of Chemistry, Nuclear Research Centre- Negev, Beer Sheva, 9001, Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
| | - Xuan Zhan
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
| | - Or Keisar
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel.,Israel Atomic Energy Commission, Tel Aviv, 61070, Israel
| | - Yair Cohen
- Department of Chemistry, Nuclear Research Centre- Negev, Beer Sheva, 9001, Israel
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
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96
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Phan HT, Haes AJ. What Does Nanoparticle Stability Mean? THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:16495-16507. [PMID: 31844485 PMCID: PMC6913534 DOI: 10.1021/acs.jpcc.9b00913] [Citation(s) in RCA: 147] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The term "nanoparticle stability" is widely used to describe the preservation of a particular nanostructure property ranging from aggregation, composition, crystallinity, shape, size, and surface chemistry. As a result, this catch-all term has various meanings, which depend on the specific nanoparticle property of interest and/or application. In this feature article, we provide an answer to the question, "What does nanoparticle stability mean?". Broadly speaking, the definition of nanoparticle stability depends on the targeted size dependent property that is exploited and can only exist for a finite period of time given all nanostructures are inherently thermodynamically and energetically unfavorable relative to bulk states. To answer this question specifically, however, the relationship between nanoparticle stability and the physical/chemical properties of metal/metal oxide nanoparticles are discussed. Specific definitions are explored in terms of aggregation state, core composition, shape, size, and surface chemistry. Next, mechanisms of promoting nanoparticle stability are defined and related to these same nanoparticle properties. Metrics involving both kinetics and thermodynamics are considered. Methods that provide quantitative metrics for measuring and modeling nanoparticle stability in terms of core composition, shape, size, and surface chemistry are outlined. The stability of solution-phase nanoparticles are also impacted by aggregation state. Thus, collision and DLVO theories are discussed. Finally, challenges and opportunities in understanding what nanoparticle stability means are addressed to facilitate further studies with this important class of materials.
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97
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Das B, Sharma M, Hazarika A, Bania KK. Self‐Assembled Monolayer Stabilized Gold‐Vanadate Nanoflute for Water Splitting Reactions. ChemistrySelect 2019. [DOI: 10.1002/slct.201901715] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Biraj Das
- Department of Chemical SciencesTezpur University Assam India 784028
| | - Mukesh Sharma
- Department of Chemical SciencesTezpur University Assam India 784028
| | - Anil Hazarika
- Department of Electronics and Communication EngineeringTezpur University Assam India 784028
| | - Kusum K. Bania
- Department of Chemical SciencesTezpur University Assam India 784028
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98
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Algar WR, Jeen T, Massey M, Peveler WJ, Asselin J. Small Surface, Big Effects, and Big Challenges: Toward Understanding Enzymatic Activity at the Inorganic Nanoparticle-Substrate Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7067-7091. [PMID: 30415548 DOI: 10.1021/acs.langmuir.8b02733] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Enzymes are important biomarkers for molecular diagnostics and targets for the action of drugs. In turn, inorganic nanoparticles (NPs) are of interest as materials for biological assays, biosensors, cellular and in vivo imaging probes, and vectors for drug delivery and theranostics. So how does an enzyme interact with a NP, and what are the outcomes of multivalent conjugation of its substrate to a NP? This invited feature article addresses the current state of the art in answering this question. Using gold nanoparticles (Au NPs) and semiconductor quantum dots (QDs) as illustrative materials, we discuss aspects of enzyme structure-function and the properties of NP interfaces and surface chemistry that determine enzyme-NP interactions. These aspects render the substrate-on-NP configurations far more complex and heterogeneous than the conventional turnover of discrete substrate molecules in bulk solution. Special attention is also given to the limitations of a standard kinetic analysis of the enzymatic turnover of these configurations, the need for a well-defined model of turnover, and whether a "hopping" model can account for behaviors such as the apparent acceleration of enzyme activity. A detailed and predictive understanding of how enzymes turn over multivalent NP-substrate conjugates will require a convergence of many concepts and tools from biochemistry, materials, and interface science. In turn, this understanding will help to enable rational, optimized, and value-added designs of NP bioconjugates for biomedical and clinical applications.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Tiffany Jeen
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Melissa Massey
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
| | - William J Peveler
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
- Division of Biomedical Engineering, School of Engineering , University of Glasgow , Glasgow G12 8LT , United Kingdom
| | - Jérémie Asselin
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
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99
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Torresan MF, Angelomé PC, Bazán-Díaz L, Velázquez-Salazar JJ, Mendoza-Cruz R, Iglesias RA, José-Yacamán M. Structural characterization of Au nano bipyramids: reshaping under thermal annealing, the capping agent effect and surface decoration with Pt. NANOTECHNOLOGY 2019; 30:205701. [PMID: 30673656 DOI: 10.1088/1361-6528/ab0144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Anisotropic gold nanoparticles offer potential applications due to their functionalities and shape-dependent properties. Reshaping noble metal nanoparticles is an interesting field with optical, surface-enhanced Raman spectroscopy, catalytic applications and potential application as a photothermic therapy. This work comprises a structural study on gold nano bipyramids (Au NBPs) and nanodumbbells, and the evolution of Au NBPs capped with cetyltrimethylammonium bromide and dodecanethiol through an in situ and ex situ heating process in high vacuum. Also, we study the reshaping of Au NBPs by the addition of Pt to study the surface modification and the strain generated on a single particle by geometric phase analysis.
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Affiliation(s)
- María Fernanda Torresan
- Instituto de Investigaciones en Fisicoquímica de Córdoba, Universidad Nacional de Córdoba, INFIQC CONICET, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Pabellón Argentina, Ala 1 Piso 2, Ciudad Universitaria, Córdoba 5000, Argentina. Gerencia Química-Centro Atómico Constituyentes, Comisión Nacional de Energía, Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina
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100
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N-heterocyclic carbene-functionalized magic-number gold nanoclusters. Nat Chem 2019; 11:419-425. [DOI: 10.1038/s41557-019-0246-5] [Citation(s) in RCA: 219] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 02/28/2019] [Indexed: 12/24/2022]
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