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Knapp TV, Hasan MR, Niebuur BJ, Widmer-Cooper A, Kraus T. Stabilization of Apolar Nanoparticle Dispersions by Molecular Additives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13527-13537. [PMID: 38889250 DOI: 10.1021/acs.langmuir.4c00996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
We study the effect of additives on the colloidal stability of alkanethiol-coated gold nanoparticles. Cyclic amines and sulfides of different sizes were added to dispersions in decane at additive concentrations below 128 mM. Small-angle X-ray scattering (SAXS) indicated that tetrahydrothiophene reduced the agglomeration temperature, Tagglo, by up to 29 °C, a considerable increase in colloidal stability. Amines had a much weaker stabilizing effect of up to 2.5 °C. We found an unexpected maximum of stabilization for low additive concentrations, where Tagglo increased at concentrations above 64 mM. Molecular dynamics simulations were used to correlate these observations with the ligand shell structure. They excluded the physisorption of additives as a stabilization mechanism and suggested that sulfides replace hexadecanethiol on the AuNP surfaces by chemisorption. This hinders ligand ordering, thereby reducing Tagglo, which explains the stabilizing effect. Clustering of chemisorbed additive molecules at high concentration restabilized the ligand ordered state, explaining the detrimental effect of higher additive concentrations. The predictions of the simulations were confirmed by using thermogravimetric analyses and SAXS measurements of washed samples that indicated that the structure of the ligand shell itself, not the presence of physisorbed additives, changes Tagglo. Finally, we calculated potentials of mean force, which show that larger sulfide-based additives have a weaker affinity for the gold surface than smaller ones due to stronger steric hindrance. This explains why smaller cyclic sulfides were the most efficient stabilizers.
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Affiliation(s)
| | - Mohammad Rashedul Hasan
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia
| | - Bart-Jan Niebuur
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Asaph Widmer-Cooper
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Saarland University, Colloid and Interface Chemistry, Campus D2 2, 66123 Saarbrücken, Germany
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2
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Wei R, Fu G, Li Z, Liu Y, Qi L, Liu K, Zhao Z, Xue M. Au-Fe 3O 4 Janus nanoparticles for imaging-guided near infrared-enhanced ferroptosis therapy in triple negative breast cancer. J Colloid Interface Sci 2024; 663:644-655. [PMID: 38430834 DOI: 10.1016/j.jcis.2024.02.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
Triple-negative breast cancer (TNBC) is insensitive to conventional therapy due to its highly invasive nature resulting in poor therapeutic outcomes. Recent studies have shown multiple genes associated with ferroptosis in TNBC, suggesting an opportunity for ferroptosis-based treatment of TNBC. However, the efficiency of present ferroptosis agents for cancer is greatly restricted due to lack of specificity and low intracellular levels of H2O2 in cancer cells. Herein, we report a nano-theranostic platform consisting of gold (Au)-iron oxide (Fe3O4) Janus nanoparticles (GION@RGD) that effectively enhances the tumor-specific Fenton reaction through utilization of near-infrared (NIR) lasers, resulting in the generation of substantial quantities of toxic hydroxyl radicals (•OH). Specifically, Au nanoparticles (NPs) converted NIR light energy into thermal energy, inducing generation of abundant intracellular H2O2, thereby enhancing the iron-induced Fenton reaction. The generated •OH not only lead to apoptosis of malignant tumor cells but also induce the accumulation of lipid peroxides, causing ferroptosis of tumor cells. After functionalizing with the activity-targeting ligand RGD (Arg-Gly-Asp), precise synergistic treatment of TNBC was achieved in vivo under the guidance of Fe3O4 enhanced T2-weighted magnetic resonance imaging (MRI). This synergistic treatment strategy of NIR-enhanced ferroptosis holds promise for the treatment of TNBC.
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Affiliation(s)
- Ruixue Wei
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China.
| | - Gaoliang Fu
- Henan Provincial Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou 450006, Henan, China
| | - Zhe Li
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Yang Liu
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Lingxiao Qi
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Kun Liu
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Zhenghuan Zhao
- College of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, China.
| | - Mengzhou Xue
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
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3
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Geng W, Xue L, Li Y, Ji J, Yuan X, Ding L, Yang R. A dual-model immobilization-free photoelectrochemical/visual colorimetric bioanalysis based on microemulsion self-assemblies mediated multifunctional signal amplification strategy. Anal Chim Acta 2023; 1277:341644. [PMID: 37604608 DOI: 10.1016/j.aca.2023.341644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 07/19/2023] [Indexed: 08/23/2023]
Abstract
Herein, a novel silver ion-loaded gold microemulsion assemblies (Au/Ag+ MAs) mediated multifunctional signal amplification strategy was proposed to construct a sensitive immobilization-free photoelectrochemical (PEC)/colorimetric biosensor for carcinoembryonic antigen (CEA) detection. Through the sandwiched reaction among CEA, the CEA aptamer (DNA1) loaded on the Au nanoparticles (NPs) functionalized iron oxide (Fe3O4) nanospheres and another CEA aptamer (DNA2) immobilized on Au/Ag+ MAs, a complex is formed and acquired by magnetic separation. Then, Au/Ag+ MAs of the complex are disassembled into Au NPs and Ag+ ions driven by an acetone response, and the obtained demulsification solution is transferred to the cadmium sulfide/cadmium telluride (CdS/CdTe) photoactive composites modified electrode. Based on the multiple inhibition functions (blocking effect of oleylamine; energy transfer effect of Au NPs; and electron snatching effect of Ag+), the photocurrent of the electrode decreases obviously, resulting in the ultrasensitive detection of CEA (a detection limit of 16 fg mL-1). Interestingly, the ion-exchange reactions between CdS/CdTe composites and Ag+ ions generate silver sulfide/silver telluride (Ag2S/Ag2Te) composites, and a color change of composites can be distinguished directly, leading to a quick visual detection of CEA. Compared with the traditional single-modal assay for CEA, such dual-modal PEC/colorimetric assay is a more accurate and reliable due to different mechanisms and independent signal conversion. This work will offer a new perspective for the applications of various self-assemblies in PEC bioanalysis.
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Affiliation(s)
- Wenchao Geng
- School of Chemical and Printing Dyeing Engineering, Henan University of Engineering, Zhengzhou, 451191, China
| | - Linsheng Xue
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Yuling Li
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Jiangying Ji
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Xinxin Yuan
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Lihua Ding
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Ruiying Yang
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China.
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Zhang F, Luo J, Chen J, Luo H, Jiang M, Yang C, Zhang H, Chen J, Dong A, Yang J. Interfacial Assembly of Nanocrystals on Nanofibers with Strong Interaction for Electrocatalytic Nitrate Reduction. Angew Chem Int Ed Engl 2023; 62:e202310383. [PMID: 37550249 DOI: 10.1002/anie.202310383] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/05/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
One-dimensional fiber architecture serves as an excellent catalyst support. The orderly arrangement of active materials on such a fiber substrate can enhance catalytic performance by exposing more active sites and facilitating mass diffusion; however, this remains a challenge. We developed an interfacial assembly strategy for the orderly distribution of metal nanocrystals on different fiber substrates to optimize their electrocatalytic performance. Using electrochemical nitrate reduction reaction (NO3 - RR) as a representative reaction, the iron-based nanofibers (Fe/NFs) assembly structure achieved an excellent nitrate removal capacity of 2317 mg N/g Fe and N2 selectivity up to 97.2 %. This strategy could promote the rational design and synthesis of fiber-based electrocatalysts.
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Affiliation(s)
- Fangzhou Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Jiamei Luo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Junliang Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Hongxia Luo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Miaomiao Jiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Chenxi Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Hui Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Jun Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute (IPRI), Australian Institute of Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2522, Australia
| | - Angang Dong
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Jianping Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
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Engel LF, González-García L, Kraus T. Consolidation and performance gains in plasma-sintered printed nanoelectrodes. NANOSCALE ADVANCES 2023; 5:4124-4132. [PMID: 37560420 PMCID: PMC10408613 DOI: 10.1039/d3na00293d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/02/2023] [Indexed: 08/11/2023]
Abstract
We report on the unusual, advantageous ageing of flexible transparent electrodes (FTEs) that were self-assembled from oleylamine-capped gold nanospheres (AuNPs) by direct nanoimprinting of inks with different particle concentrations (cAu = 3 mg mL-1 to 30 mg mL-1). The resulting lines were less than 2.5 μm wide and consisted of disordered particle assemblies. Small-Angle X-ray Scattering confirmed that particle packing did not change with ink concentration. Plasma sintering converted the printed structures into lines with a thin, electrically conductive metal shell and a less conductive hybrid core. We studied the opto-electronic performance directly after plasma sintering and after fourteen days of storage at 22 °C and 55% rH in the dark. The mean optical transmittance T̄400-800 in the range from 400 nm to 800 nm increased by up to ≈ 3%, while the sheet resistance Rsh strongly decreased by up to ≈ 82% at all concentrations. We correlated the changes with morphological changes visible in scanning and transmission electron microscopy and identified two sequential ageing stages: (I) post-plasma relaxation effects in and consolidation of the shell, and (II) particle re-organization, de-mixing, coarsening, and densification of the core with plating of Au from the core onto the shell, followed by solid-state de-wetting (ink concentrations cAu < 15 mg mL-1) or stability (cAu ≥ 15 mg mL-1). The plating of Au from the hybrid core improved the FTEs' Figure of Merit FOM = T̄400-800·Rsh-1 by up to ≈ 5.8 times and explains the stable value of ≈ 3.3%·Ωsq-1 reached after 7 days of ageing at cAu = 30 mg mL-1.
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Affiliation(s)
- Lukas F Engel
- INM - Leibniz Institute for New Materials, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
| | - Lola González-García
- INM - Leibniz Institute for New Materials, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
- Department of Materials Science and Engineering, Saarland University, Campus D2 2 66123 Saarbrücken Germany
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
- Colloid and Interface Chemistry, Saarland University, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-389
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Hasan MR, Niebuur BJ, Siebrecht M, Kuttich B, Schweins R, Widmer-Cooper A, Kraus T. The Colloidal Stability of Apolar Nanoparticles in Solvent Mixtures. ACS NANO 2023; 17:9302-9312. [PMID: 37163685 DOI: 10.1021/acsnano.3c00812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Solvent engineering is a powerful and versatile method to tune colloidal stability. Here, we link the molecular structure of apolar ligand shells on gold nanoparticles with their colloidal stability in solvent mixtures. The agglomeration temperature of the particles was measured with small-angle X-ray scattering. It depended on solvent composition and changed linearly for hexane-hexadecane mixtures, but nonlinearly for cyclohexane-hexadecane and hexanol-hexadecane mixtures. Molecular dynamics (MD) simulations indicate that agglomeration is dominated by temperature-dependent ligand order in the alkane mixtures and that the temperature at which the ligand shell orders depends on the solvent composition near the ligands, which can differ substantially from the bulk composition. Small-angle neutron scattering confirmed that, at intermediate solvent compositions above the agglomeration temperature, the fraction of cyclohexane near the ligands was larger than in the bulk. The enrichment of cyclohexane near the ligands stabilized their disordered state, which, consequently, led to the experimentally observed nonlinear trend of the agglomeration temperature. In contrast, hexanol was depleted from the ligand shell at all temperatures. This again stabilized the disordered state. Furthermore, we found that agglomeration at high hexanol fractions was driven by a solvophobic effect that exceeded the influence of ligand order. The results show that strong nonlinearities in the colloidal stability of nanoparticle dispersions in solvent mixtures are directly linked to the molecular details of ligand-solvent and solvent-solvent interactions, which can be used to precisely tune stability.
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Affiliation(s)
- Mohammad Rashedul Hasan
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Bart-Jan Niebuur
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Martin Siebrecht
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Björn Kuttich
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Ralf Schweins
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble, France
| | - Asaph Widmer-Cooper
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
- The University of Sydney Nano Institute, University of Sydney, 66123 Sydney, New South Wales, Australia
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Colloid and Interface Chemistry, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany
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7
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Buchheit R, Niebuur BJ, González-García L, Kraus T. Surface polarization, field homogeneity, and dielectric breakdown in ordered and disordered nanodielectrics based on gold-polystyrene superlattices. NANOSCALE 2023; 15:7526-7536. [PMID: 37022092 DOI: 10.1039/d3nr01038d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Hybrid dielectrics were prepared from dispersions of nanoparticles with gold cores (diameters from 2.9 nm to 8.2 nm) and covalently bound thiol-terminated polystyrene shells (5000 Da and 11 000 Da) in toluene. Their microstructure was investigated with small angle X-ray scattering and transmission electron microscopy. The particles arranged in nanodielectric layers with either face-centered cubic or random packing, depending on the ligand length and core diameter. Thin film capacitors were prepared by spin-coating inks on silicon substrates, contacted with sputtered aluminum electrodes, and characterized with impedance spectroscopy between 1 Hz and 1 MHz. The dielectric constants were dominated by polarization at the gold-polystyrene interfaces that we could precisely tune via the core diameter. There was no difference in the dielectric constant between random and supercrystalline particle packings, but the dielectric losses depended on the layer structure. A model that combines Maxwell-Wagner-Sillars theory and percolation theory described the relationship of the specific interfacial area and the dielectric constant quantitatively. The electric breakdown of the nanodielectric layers sensitively depended on particle packing. A highest breakdown field strength of 158.7 MV m-1 was found for the sample with 8.2 nm cores and short ligands that had a face-centered cubic structure. Breakdown apparently is initiated at the microscopic maxima of the electric field that depends on particle packing. The relevance of the results for industrially produced devices was demonstrated on inkjet printed thin film capacitors with an area of 0.79 mm2 on aluminum coated PET foils that retained their capacity of 1.24 ± 0.01 nF@10 kHz during 3000 bending cycles.
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Affiliation(s)
- Roman Buchheit
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Bart-Jan Niebuur
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Lola González-García
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Department of Materials Science and Engineering, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany.
| | - Tobias Kraus
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Colloid and Interface Chemistry, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany.
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Pyttlik A, Kuttich B, Kraus T. Microgravity Removes Reaction Limits from Nonpolar Nanoparticle Agglomeration. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204621. [PMID: 36216735 DOI: 10.1002/smll.202204621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Gravity can affect the agglomeration of nanoparticles by changing convection and sedimentation. The temperature-induced agglomeration of hexadecanethiol-capped gold nanoparticles in microgravity (µ g) is studied at the ZARM (Center of Applied Space Technology and Microgravity) drop tower and compared to their agglomeration on the ground (1 g). Nonpolar nanoparticles with a hydrodynamic diameter of 13 nm are dispersed in tetradecane, rapidly cooled from 70 to 10 °C to induce agglomeration, and observed by dynamic light scattering at a time resolution of 1 s. The mean hydrodynamic diameters of the agglomerates formed after 8 s in microgravity are 3 times (for low initial concentrations) to 5 times (at high initial concentrations) larger than on the ground. The observations are consistent with an agglomeration process that is closer to the reaction limit on thground and closer to the diffusion limit in microgravity.
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Affiliation(s)
- Andrea Pyttlik
- Structure Formation, INM Leibniz-Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
| | - Björn Kuttich
- Structure Formation, INM Leibniz-Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
| | - Tobias Kraus
- Structure Formation, INM Leibniz-Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
- Colloid and Interface Chemistry, Saarland University, Campus D2 2, 66123, Saarbrücken, Germany
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Engel LF, González-García L, Kraus T. Flexible and transparent electrodes imprinted from metal nanostructures: morphology and opto-electronic performance. NANOSCALE ADVANCES 2022; 4:3370-3380. [PMID: 36131708 PMCID: PMC9419766 DOI: 10.1039/d2na00259k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
We directed the self-assembly of nanoscale colloids via direct nanoimprint lithography to create flexible transparent electrodes (FTEs) with metal line widths below 3 μm in a roll-to-roll-compatible process. Gold nanowires and nanospheres with oleylamine shells were imprinted with soft silicone stamps, arranged into grids of parallel lines, and converted into metal lines in a plasma process. We studied the hierarchical structure and opto-electronic performance of the resulting grids as a function of particle geometry and concentration. The performance in terms of optical transmittance was dominated by the line width. Analysis of cross-sections indicated that plasma sintering only partially removed the insulating ligands and formed lines with thin conductive shells and a non-conductive core. We provide evidence that the self-assembly of high-aspect nanowires can compensate for defects of the stamp and substrate irregularities during imprinting, while spheres cannot. The wire-based electrodes thus outperformed the sphere-based electrodes at ratios of optical transmittance to sheet resistance of up to ≈ 0.9% Ωsq -1, while spheres only reached ≈ 0.55% Ωsq -1.
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Affiliation(s)
- Lukas F Engel
- INM - Leibniz Institute for New Materials Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
| | - Lola González-García
- INM - Leibniz Institute for New Materials Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
| | - Tobias Kraus
- Colloid and Interface Chemistry, Saarland University Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-389
- INM - Leibniz Institute for New Materials Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
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10
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Mellor RD, Uchegbu IF. Ultrasmall-in-Nano: Why Size Matters. NANOMATERIALS 2022; 12:nano12142476. [PMID: 35889699 PMCID: PMC9317835 DOI: 10.3390/nano12142476] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 01/06/2023]
Abstract
Gold nanoparticles (AuNPs) are continuing to gain popularity in the field of nanotechnology. New methods are continuously being developed to tune the particles’ physicochemical properties, resulting in control over their biological fate and applicability to in vivo diagnostics and therapy. This review focuses on the effects of varying particle size on optical properties, opsonization, cellular internalization, renal clearance, biodistribution, tumor accumulation, and toxicity. We review the common methods of synthesizing ultrasmall AuNPs, as well as the emerging constructs termed ultrasmall-in-nano—an approach which promises to provide the desirable properties from both ends of the AuNP size range. We review the various applications and outcomes of ultrasmall-in-nano constructs in vitro and in vivo.
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11
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Bo A, Liu Y, Kuttich B, Kraus T, Widmer-Cooper A, de Jonge N. Nanoscale Faceting and Ligand Shell Structure Dominate the Self-Assembly of Nonpolar Nanoparticles into Superlattices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2109093. [PMID: 35266222 DOI: 10.1002/adma.202109093] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Self-assembly of nanoscale structures at liquid-solid interfaces occurs in a broad range of industrial processes and is found in various phenomena in nature. Conventional theory assumes spherical particles and homogeneous surfaces, but that model is oversimplified, and nanoscale in situ observations are needed for a more complete understanding. Liquid-phase scanning transmission electron microscopy (LP-STEM) is used to examine the interactions that direct the self-assembly of superlattices formed by gold nanoparticles (AuNPs) in nonpolar liquids. Varying the molecular coating of the substrate modulates short-range attraction and leads to switching between a range of different geometric structures, including hexagonal close-packed (hcp), simple hexagonal (sh), dodecahedral quasi-crystal (dqc), and body-centered cubic (bcc) lattices, as well as random distributions. Langevin dynamics simulations explain the experimental results in terms of the interplay between nanoparticle faceting, ligand shell structure, and substrate-NP interactions.
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Affiliation(s)
- Arixin Bo
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
| | - Yawei Liu
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Sydney, Sydney, 2006, Australia
| | - Björn Kuttich
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123, Saarbrücken, Germany
| | - Asaph Widmer-Cooper
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Sydney, Sydney, 2006, Australia
- The University of Sydney Nano Institute, The University of Sydney, Sydney, 2006, Australia
| | - Niels de Jonge
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
- Department of Physics, Saarland University, 66123, Saarbrücken, Germany
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12
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Barhoum A, García-Betancourt ML, Jeevanandam J, Hussien EA, Mekkawy SA, Mostafa M, Omran MM, S. Abdalla M, Bechelany M. Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:177. [PMID: 35055196 PMCID: PMC8780156 DOI: 10.3390/nano12020177] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/26/2021] [Accepted: 12/31/2021] [Indexed: 02/04/2023]
Abstract
Nanomaterials are becoming important materials in several fields and industries thanks to their very reduced size and shape-related features. Scientists think that nanoparticles and nanostructured materials originated during the Big Bang process from meteorites leading to the formation of the universe and Earth. Since 1990, the term nanotechnology became very popular due to advances in imaging technologies that paved the way to specific industrial applications. Currently, nanoparticles and nanostructured materials are synthesized on a large scale and are indispensable for many industries. This fact fosters and supports research in biochemistry, biophysics, and biochemical engineering applications. Recently, nanotechnology has been combined with other sciences to fabricate new forms of nanomaterials that could be used, for instance, for diagnostic tools, drug delivery systems, energy generation/storage, environmental remediation as well as agriculture and food processing. In contrast with traditional materials, specific features can be integrated into nanoparticles, nanostructures, and nanosystems by simply modifying their scale, shape, and composition. This article first summarizes the history of nanomaterials and nanotechnology. Followed by the progress that led to improved synthesis processes to produce different nanoparticles and nanostructures characterized by specific features. The content finally presents various origins and sources of nanomaterials, synthesis strategies, their toxicity, risks, regulations, and self-aggregation.
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Affiliation(s)
- Ahmed Barhoum
- NanoStruc Research Group, Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt; (E.A.H.); (M.M.)
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
| | | | - Jaison Jeevanandam
- CQM—Centro de Química da Madeira, MMRG, Campus da Penteada, Universidade da Madeira, 9020-105 Funchal, Portugal;
| | - Eman A. Hussien
- NanoStruc Research Group, Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt; (E.A.H.); (M.M.)
| | - Sara A. Mekkawy
- Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt; (S.A.M.); (M.M.O.); (M.S.A.)
| | - Menna Mostafa
- NanoStruc Research Group, Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt; (E.A.H.); (M.M.)
| | - Mohamed M. Omran
- Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt; (S.A.M.); (M.M.O.); (M.S.A.)
| | - Mohga S. Abdalla
- Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt; (S.A.M.); (M.M.O.); (M.S.A.)
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM, UMR 5635, Université Montpellier, ENSCM, CNRS, 34000 Montpellier, France
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13
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Recent Trends in Noble Metal Nanoparticles for Colorimetric Chemical Sensing and Micro-Electronic Packaging Applications. METALS 2021. [DOI: 10.3390/met11020329] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Noble metal NPs are highly attractive candidates because of their unique combination of physical, chemical, mechanical, and structural properties. A lot of developments in this area are still fascinating the materials research community, and are broadly categorized in various sectors such as chemical sensors, biosensors, Förster resonance energy transfer (FRET), and microelectronic applications. The related function and properties of the noble metals in these areas can be further tailored by tuning their chemical, optical, and electronic properties that are influenced by their size, shape, and distribution. The most widely used Au and Ag NPs in dispersed phase below 100 nm exhibit strong color change in the visible range which alters upon aggregation of the NPs. The chemical sensing of the analyte is influenced by these NPs aggregates. In this article, we have summarized the uniqueness of noble metal NPs, their synthesis methods, nucleation and growth process, and their important applications in chemical sensing, microelectronic packaging, and Förster resonance energy transfer.
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14
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Li W, Taylor MG, Bayerl D, Mozaffari S, Dixit M, Ivanov S, Seifert S, Lee B, Shanaiah N, Lu Y, Kovarik L, Mpourmpakis G, Karim AM. Solvent manipulation of the pre-reduction metal-ligand complex and particle-ligand binding for controlled synthesis of Pd nanoparticles. NANOSCALE 2021; 13:206-217. [PMID: 33325939 DOI: 10.1039/d0nr06078j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Understanding how to control the nucleation and growth rates is crucial for designing nanoparticles with specific sizes and shapes. In this study, we show that the nucleation and growth rates are correlated with the thermodynamics of metal-ligand/solvent binding for the pre-reduction complex and the surface of the nanoparticle, respectively. To obtain these correlations, we measured the nucleation and growth rates by in situ small angle X-ray scattering during the synthesis of colloidal Pd nanoparticles in the presence of trioctylphosphine in solvents of varying coordinating ability. The results show that the nucleation rate decreased, while the growth rate increased in the following order, toluene, piperidine, 3,4-lutidine and pyridine, leading to a large increase in the final nanoparticle size (from 1.4 nm in toluene to 5.0 nm in pyridine). Using density functional theory (DFT), complemented by 31P nuclear magnetic resonance and X-ray absorption spectroscopy, we calculated the reduction Gibbs free energies of the solvent-dependent dominant pre-reduction complex and the solvent-nanoparticle binding energy. The results indicate that lower nucleation rates originate from solvent coordination which stabilizes the pre-reduction complex and increases its reduction free energy. At the same time, DFT calculations suggest that the solvent coordination affects the effective capping of the surface where stronger binding solvents slow the nanoparticle growth by lowering the number of active sites (not already bound by trioctylphosphine). The findings represent a promising advancement towards understanding the microscopic connection between the metal-ligand thermodynamic interactions and the kinetics of nucleation and growth to control the size of colloidal metal nanoparticles.
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Affiliation(s)
- Wenhui Li
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA.
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15
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Liu Z, Zhang P, Pyttlik A, Kraus T, Volmer DA. Influence of core size and capping ligand of gold nanoparticles on the desorption/ionization efficiency of small biomolecules in AP‐SALDI‐MS. ACTA ACUST UNITED AC 2020. [DOI: 10.1002/ansa.202000002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhen Liu
- Institute of Bioanalytical Chemistry Saarland University Saarbrücken Germany
| | - Peng Zhang
- School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
| | - Andrea Pyttlik
- INM‐Leibniz Institute for New Materials Saarbrücken Germany
| | - Tobias Kraus
- INM‐Leibniz Institute for New Materials Saarbrücken Germany
- Institute of Colloid and Interface Chemistry Saarland University Saarbrücken Germany
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16
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Velázquez-Salazar JJ, Bazán-Díaz L, Zhang Q, Mendoza-Cruz R, Montaño-Priede L, Guisbiers G, Large N, Link S, José-Yacamán M. Controlled Overgrowth of Five-Fold Concave Nanoparticles into Plasmonic Nanostars and Their Single-Particle Scattering Properties. ACS NANO 2019; 13:10113-10128. [PMID: 31419107 DOI: 10.1021/acsnano.9b03084] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Growth of anisotropic nanostructures enables the manipulation of optical properties across the electromagnetic spectrum by fine morphological tuning of the nanoparticles. Among them, stellated metallic nanostructures present enhanced properties owing to their complex shape, and hence, the control over the final morphology becomes of great importance. Herein, a seed-mediated method for the high-yield production of goldrich-copper concave branched nanostructures and their structural and optical characterization is reported. The synthesis protocol enabled excellent control and tunability of the final morphology, from concave pentagonal nanoparticles to five-fold branched nanoparticles, named "nanostars". The anisotropic shape was achieved via kinetic control over the synthesis conditions by selective passivation of facets using a capping agent and assisted by the presence of copper chloride ions, both having a crucial impact over the final structure. Optical extinction measurements of nanostars in solution indicated a broad spectral response, hiding the properties of the individual nanostars. Hence, single-particle scattering measurements of individual concave pentagonal nanoparticles and concave nanostars were performed to determine the origin of the multiple plasmon bands by correlation with their morphological features, following their growth evolution. Finite-difference time-domain calculations delivered insights into the geometry-dependent plasmonic properties of concave nanostars and their packed aggregates. Our results uncover the intrinsic scattering properties of individual nanostars and the origin of the broad spectral response, which is mostly due to z-direction packed aggregates.
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Affiliation(s)
| | | | | | | | | | - Grégory Guisbiers
- Department of Physics & Astronomy , The University of Arkansas at Little Rock , 2801 South University Avenue , Little Rock , Arkansas 72204 , United States
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17
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Doblas D, Kister T, Cano-Bonilla M, González-García L, Kraus T. Colloidal Solubility and Agglomeration of Apolar Nanoparticles in Different Solvents. NANO LETTERS 2019; 19:5246-5252. [PMID: 31251877 DOI: 10.1021/acs.nanolett.9b01688] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We studied the concentration-dependent agglomeration of apolar nanoparticles in different solvents. Octanethiol-stabilized gold nanoparticles (AuNPs) in evaporating liquid droplets were observed in situ using small-angle X-ray scattering. Concurrent analysis of liquid volume and particle agglomeration provided time-dependent absolute concentrations of free and agglomerated particles. All dispersions underwent an initial stage where the particle concentration increased but no agglomerates formed. Subsequently, agglomeration started at concentrations that varied by several orders of magnitude for different solvents. While agglomerates grew, the concentration of the dispersed particles remained at a constant "colloidal solubility" in most solvents. We consistently found that the colloidal stability of AuNPs decreased as cyclohexane > heptane > nonane > decane > toluene and suggest that details of the molecular interactions between solvent and ligand shell set this order.
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Affiliation(s)
- David Doblas
- INM - Leibniz-Institute for New Materials , Campus D2 2, 66123 Saarbrücken , Germany
| | - Thomas Kister
- INM - Leibniz-Institute for New Materials , Campus D2 2, 66123 Saarbrücken , Germany
| | - Marina Cano-Bonilla
- INM - Leibniz-Institute for New Materials , Campus D2 2, 66123 Saarbrücken , Germany
| | - Lola González-García
- INM - Leibniz-Institute for New Materials , Campus D2 2, 66123 Saarbrücken , Germany
| | - Tobias Kraus
- INM - Leibniz-Institute for New Materials , Campus D2 2, 66123 Saarbrücken , Germany
- Colloid and Interface Chemistry , Saarland University , 66123 Saarbrücken , Germany
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18
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Satyavolu NSR, Loh KY, Tan LH, Lu Y. Discovery of and Insights into DNA "Codes" for Tunable Morphologies of Metal Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900975. [PMID: 31074939 PMCID: PMC6663601 DOI: 10.1002/smll.201900975] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/14/2019] [Indexed: 05/28/2023]
Abstract
The discovery and elucidation of genetic codes has profoundly changed not only biology but also many fields of science and engineering. The fundamental building blocks of life comprises of four simple deoxyribonucleotides and yet their combinations serve as the carrier of genetic information that encodes for proteins that can carry out many biological functions due to their unique functionalities. Inspired by nature, the functionalities of DNA molecules have been used as a capping ligand for controlling morphology of nanomaterials, and such a control is sequence dependent, which translates into distinct physical and chemical properties of resulting nanoparticles. Herein, an overview on the use of DNA as engineered codes for controlling the morphology of metal nanoparticles, such as gold, silver, and Pd-Au bimetallic nanoparticles is provided. Fundamental insights into rules governing DNA controlled growth mechanisms are also summarized, based on understanding of the affinity of the DNA nucleobases to various metals, the effect of combination of nucleobases, functional modification of DNA, the secondary structures of DNA, and the properties of the seed employed. The resulting physical and chemical properties of these DNA encoded nanomaterials are also reviewed, while perspectives into the future directions of DNA-mediated nanoparticle synthesis are provided.
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Affiliation(s)
- Nitya Sai Reddy Satyavolu
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Kang Yong Loh
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Li Huey Tan
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yi Lu
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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19
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Liu J, Wang X, Zhang W. Atomic Force Microscopy Imaging Study of Aligning DNA by Dumbbell-like Au-Fe 3O 4 Magnetic Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14875-14881. [PMID: 30011364 DOI: 10.1021/acs.langmuir.8b01784] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Studies on nucleic acid structure and interactions between nucleic acid and its binding molecules are of great importance for understanding and controlling many important biological processes. Atomic force microscopy (AFM) imaging is one of the most efficient methods to disclose the DNA structure and binding modes between DNA and DNA-binding molecules. Long-chain DNA tends to form a random coiled structure, which prevents direct AFM imaging observation of the subtle structure formed by DNA itself or protein binding. Aligning DNA from the random coiled state into the extended state is not only important for applications in DNA nanotechnology but also for elucidating the interaction mechanism between DNA and other molecules. Here, we developed an efficient method based on the magnetic field to align long-chain DNA on a silicon surface. We used AFM imaging to study the alignment of DNA at the single-molecule level, showing that DNA can be stretched and highly aligned by the manipulation of magnetic nanoparticles tethered to one end of DNA and that the aligned DNA can be imaged clearly by AFM. In the absence of the magnetic field, the aligned DNA can relax back to a random coiled state upon rinsing. Such alignment and relaxation can be repeated many times, which provides an efficient method for the manipulation of individual DNA molecules and the investigation of DNA and DNA-binding molecule interactions.
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Affiliation(s)
- Jianyu Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Xinxin Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
| | - Wenke Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry , Jilin University , Changchun 130012 , People's Republic of China
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20
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Xi XJ, Yang JS, Wang JY, Dong XY, Zang SQ. New stable isomorphous Ag 34 and Ag 33Au nanoclusters with an open shell electronic structure. NANOSCALE 2018; 10:21013-21018. [PMID: 30427029 DOI: 10.1039/c8nr07714b] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel atom-precise 3-electron homosilver nanocluster (Ag34) has been assembled for the first time by the oxidation of a thiol. When adding AuPPh3Cl in the reaction, we obtained an alloyed Ag33Au nanocluster, which shares a similar framework as that of Ag34, in which a doping Au atom replaced a core silver atom. Notably, both Ag34 and alloyed Ag33Au demonstrated exceptional stability in solution and solid state over 3 months, which is difficult to explain by using the superatom model. Such Ag34 and Ag33Au complexes complement the nanoclusters with an open shell electronic structure and unveil a new approach to synthesize monodisperse nanoclusters under mild conditions.
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Affiliation(s)
- Xiao-Juan Xi
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.
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21
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Monego D, Kister T, Kirkwood N, Mulvaney P, Widmer-Cooper A, Kraus T. Colloidal Stability of Apolar Nanoparticles: Role of Ligand Length. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12982-12989. [PMID: 30299970 DOI: 10.1021/acs.langmuir.8b02883] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Inorganic nanoparticle cores are often coated with organic ligands to render them dispersible in apolar solvents. However, the effect of the ligand shell on the colloidal stability of the overall hybrid particle is not fully understood. In particular, it is not known how the length of an apolar alkyl ligand chain affects the stability of a nanoparticle dispersion against agglomeration. Here, small-angle X-ray scattering and molecular dynamics simulations have been used to study the interactions between gold nanoparticles and between cadmium selenide nanoparticles passivated by alkanethiol ligands with 12-18 carbons in the solvent decane. We find that increasing the ligand length increases colloidal stability in the core-dominated regime but decreases it in the ligand-dominated regime. This unexpected inversion is connected to the transition from ligand-dominated to core-dominated agglomeration when the core diameter increases at constant ligand length. Our results provide a microscopic picture of the forces that determine the colloidal stability of apolar nanoparticles and explain why classical colloid theory fails.
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Affiliation(s)
- Debora Monego
- ARC Centre of Excellence in Exciton Science, School of Chemistry and The University of Sydney Nano Institute , University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Thomas Kister
- INM-Leibniz Institute for New Materials , Campus D2 2 , 66123 Saarbrücken , Germany
| | - Nicholas Kirkwood
- ARC Centre of Excellence in Exciton Science, School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Paul Mulvaney
- ARC Centre of Excellence in Exciton Science, School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Asaph Widmer-Cooper
- ARC Centre of Excellence in Exciton Science, School of Chemistry and The University of Sydney Nano Institute , University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Tobias Kraus
- INM-Leibniz Institute for New Materials , Campus D2 2 , 66123 Saarbrücken , Germany
- Colloid and Interface Chemistry , Saarland University , Campus D2 2 , 66123 Saarbrücken , Germany
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22
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Mathew BB, Biju VG, Nideghatta Beeregowda K. Accumulation of lead (Pb II) metal ions by Bacillus toyonensis SCE1 species, innate to industrial-area ground water and nanoparticle synthesis. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0892-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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23
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Yang Y, Wang B, Shen X, Yao L, Wang L, Chen X, Xie S, Li T, Hu J, Yang D, Dong A. Scalable Assembly of Crystalline Binary Nanocrystal Superparticles and Their Enhanced Magnetic and Electrochemical Properties. J Am Chem Soc 2018; 140:15038-15047. [DOI: 10.1021/jacs.8b09779] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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24
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Doblas D, Hubertus J, Kister T, Kraus T. A Translucent Nanocomposite with Liquid Inclusions of a Responsive Nanoparticle Dispersion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1803159. [PMID: 30141194 DOI: 10.1002/adma.201803159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 07/14/2018] [Indexed: 05/15/2023]
Abstract
Active nanocomposites are created with liquid inclusions that contain plasmonic gold nanoparticles inside a polymeric matrix. The alkylthiol-coated gold particles are designed to reversible agglomerate at certain temperatures, which changes the plasmonic coupling and thus optical properties. It is found that particles confined to the liquid inclusions inside the active composite retain this capability and cause macroscopic, temperature-dependent color change of the solid. The transition is fully reversible for at least 100 times and tunable in temperature via particle size and ligand. This method is suitable to "package" responsive dispersion in solid composites to exploit their dynamic properties in materials.
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Affiliation(s)
- David Doblas
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
| | - Jonas Hubertus
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
| | - Thomas Kister
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
- Colloid and Interface Chemistry, Saarland University, Saarbrücken, 66123, Germany
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25
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Kister T, Monego D, Mulvaney P, Widmer-Cooper A, Kraus T. Colloidal Stability of Apolar Nanoparticles: The Role of Particle Size and Ligand Shell Structure. ACS NANO 2018; 12:5969-5977. [PMID: 29842786 DOI: 10.1021/acsnano.8b02202] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Being able to predict and tune the colloidal stability of nanoparticles is essential for a wide range of applications, yet our ability to do so is currently poor due to a lack of understanding of how they interact with one another. Here, we show that the agglomeration of apolar particles is dominated by either the core or the ligand shell depending on the particle size and materials. We do this by using small-angle X-ray scattering and molecular dynamics simulations to characterize the interaction between hexadecanethiol passivated gold nanoparticles in decane solvent. For smaller particles, the agglomeration temperature and interparticle spacing are determined by ordering of the ligand shell into bundles of aligned ligands that attract one another and interlock. In contrast, the agglomeration of larger particles is driven by van der Waals attraction between the gold cores, which eventually becomes strong enough to compress the ligand shell. Our results provide a microscopic description of the forces that determine the colloidal stability of apolar nanoparticles and explain why classical colloid theory fails.
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Affiliation(s)
- Thomas Kister
- INM-Leibniz Institute for New Materials , Campus D2 2 , 66123 Saarbrücken , Germany
| | - Debora Monego
- ARC Centre of Excellence in Exciton Science, School of Chemistry , University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Paul Mulvaney
- ARC Centre of Excellence in Exciton Science, School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Asaph Widmer-Cooper
- ARC Centre of Excellence in Exciton Science, School of Chemistry , University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Tobias Kraus
- INM-Leibniz Institute for New Materials , Campus D2 2 , 66123 Saarbrücken , Germany
- Colloid and Interface Chemistry , Saarland University , Campus D2 2 , 66123 Saarbrücken , Germany
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26
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Wang L, Yang Y, Shen X, Li T, Hu J, Yang D, Dong A. Circular assembly of colloidal nanoparticles at the liquid-air interface mediated by block copolymers. NANOSCALE 2018; 10:11196-11204. [PMID: 29873374 DOI: 10.1039/c8nr02519c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The self-assembly of colloidal nanoparticles (NPs) mediated by block copolymers (BCPs) is an efficient way for fabricating nanocomposite superstructures with precise geometric control. Here we report a generalized liquid-air interfacial strategy by exploiting the versatility in tuning the specific affinities between the grafted polymeric ligands and BCPs, enabling the circular assembly of NPs on a liquid surface to afford unique ring-like superstructures. Fe3O4 NPs act as the model system; however, CoFe2O4 and Au NPs are also demonstrated using the proposed assembly method. Functionalizing NPs with a specific polymeric ligand is the key to achieve the circular assembly of NPs, while both the subphase and the solvent annealing temperature have profound influence on the microphase separation behaviors of BCPs and therefore the morphology of the resulting NP assemblies. Moreover, the co-assembly of two types of NPs grafted with distinct polymeric ligands enables unprecendented heterogeneous concentric rings, with each ring consisting of one type of NP.
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Affiliation(s)
- Lei Wang
- State Key Laboratory of Molecular Engineering of Polymer and Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
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27
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Yang Y, Serrano LA, Guldin S. A Versatile AuNP Synthetic Platform for Decoupled Control of Size and Surface Composition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6820-6826. [PMID: 29768005 DOI: 10.1021/acs.langmuir.8b00353] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
While a plethora of protocols exist for the synthesis of sub-10-nm gold nanoparticles (AuNPs), independent control over the size and surface composition remains restricted. This poses a particular challenge for systematic studies of AuNP structure-function relationships and the optimization of crucial design parameters. To this end, we report on a modular two-step approach based on the synthesis of AuNPs in oleylamine (OAm) followed by subsequent functionalization with thiol ligands and mixtures thereof. The synthesis of OAm-capped AuNPs enables fine-tuning of the core size in the range of 2-7 nm by varying the reaction temperature. The subsequent thiol-for-OAm ligand exchange allows a reliable generation of thiol-capped AuNPs with target surface functionality. The compatibility of this approach with a vast library of thiol ligands provides detailed control of the mixed ligand composition and solubility in a wide range of solvents ranging from water to hexane. This decoupled control over the AuNP core and ligand shell provides a powerful toolbox for the methodical screening of optimal design parameters and facile preparation of AuNPs with target properties.
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Affiliation(s)
- Ye Yang
- Department of Chemical Engineering , University College London , Torrington Place , London WC1E 7JE , U.K
| | - Luis A Serrano
- Department of Chemical Engineering , University College London , Torrington Place , London WC1E 7JE , U.K
| | - Stefan Guldin
- Department of Chemical Engineering , University College London , Torrington Place , London WC1E 7JE , U.K
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28
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Gerstner D, Kraus T. Rapid nanoparticle self-assembly at elevated temperatures. NANOSCALE 2018; 10:8009-8013. [PMID: 29666855 DOI: 10.1039/c8nr00597d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We demonstrate that rapid nanoparticle self-assembly is possible in organic solvents if the temperature is above the melting point of the particles' ligand shell. Flow experiments coupled to small-angle X-ray scattering reveal the agglomeration kinetics and agglomerate structures of alkylthiol-coated gold nanoparticles at different temperatures, interparticle potentials, and times. Our experiments allow to discriminate between the effects of long-range and short-range interactions on self-assembly: crystalline agglomerates formed for a wide range of potentials, but only at temperatures where the short-ranged mobility was sufficient. Rapid superlattice formation in less than 3 s was observed for strongly attractive potentials at high temperatures, implying an assembly rate that is sufficient for large-scale material synthesis. Strong attraction between the particles did not impede high-quality self-assembly when short-ranged mobility was provided by ligands above a specific temperature.
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Kister T, Maurer JHM, González-García L, Kraus T. Ligand-Dependent Nanoparticle Assembly and Its Impact on the Printing of Transparent Electrodes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6079-6083. [PMID: 29400942 DOI: 10.1021/acsami.7b18579] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Metal grids with submicron line diameters are optically transparent, mechanically flexible, and suitable materials for transparent and flexible electronics. Printing such narrow lines with dilute metal nanoparticle inks is challenging because it requires percolation throughout the particle packing. Here, we print fully connected submicron lines of 3.2 nm diameter gold nanoparticles and vary the organic ligand shell to study the relation between colloidal interactions, ligand binding to the metal core, and conductivity of the printed lines. We find that particles with repulsive potentials aid the formation of continuous lines, but the required long ligand molecules impede conductivity and need to be removed after printing. Weakly bound alkylamines provided sufficient interparticle repulsion and were easy to remove with a soft plasma treatment after printing, so that grids with a transparencies above 90% and a conductivity of 150 Ω sq-1 could be printed.
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Affiliation(s)
- Thomas Kister
- INM - Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Johannes H M Maurer
- INM - Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Lola González-García
- INM - Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
- Colloid and Interface Chemistry, Saarland University , Saarbrücken, Germany
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30
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Wang P, Qi X, Zhang X, Wang T, Li Y, Zhang K, Zhao S, Zhou J, Fu Y. Solvent: A Key in Digestive Ripening for Monodisperse Au Nanoparticles. NANOSCALE RESEARCH LETTERS 2017; 12:25. [PMID: 28070836 PMCID: PMC5222767 DOI: 10.1186/s11671-016-1797-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 12/14/2016] [Indexed: 05/30/2023]
Abstract
This work has mainly investigated the influence of the solvent on the nanoparticles distribution in digestive ripening. The experiments suggested that the solvents played a key role in digestive ripening of Au nanoparticles (Au NPs). For the benzol solvents, the resulting size distribution of Au NPs was inversely related to the solvent polarity. It may be interpreted by the low Gibbs free energy of nanoparticles in the high polarity medium, which was supposedly in favor of reducing the nanoparticles distribution. Through digestive ripening in the highly polar benzol solvent of p-chlorotoluene, monodisperse Au NPs with relative standard deviation (RSD) of 4.8% were achieved. This indicated that digestive ripening was an effective and practical way to prepare high-quality nanoparticles, which holds great promise for the nanoscience and nanotechnology. Graphical Abstract The polarity of benzol solvent plays significant role in obtaining high-quality monodisperse Au nanoparticles.
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Affiliation(s)
- Peng Wang
- College of Sciences, Northeastern University, Shenyang, 110004, China
| | - Xuan Qi
- College of Sciences, Northeastern University, Shenyang, 110004, China
| | - Xuemin Zhang
- College of Sciences, Northeastern University, Shenyang, 110004, China
| | - Tieqiang Wang
- College of Sciences, Northeastern University, Shenyang, 110004, China
| | - Yunong Li
- College of Sciences, Northeastern University, Shenyang, 110004, China
| | - Kai Zhang
- College of Sciences, Northeastern University, Shenyang, 110004, China
| | - Shuang Zhao
- College of Sciences, Northeastern University, Shenyang, 110004, China.
| | - Jun Zhou
- College of Sciences, Northeastern University, Shenyang, 110004, China.
- School of Materials Science and Engineering, Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang, 110004, China.
| | - Yu Fu
- College of Sciences, Northeastern University, Shenyang, 110004, China.
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31
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Udayabhaskararao T, Altantzis T, Houben L, Coronado-Puchau M, Langer J, Popovitz-Biro R, Liz-Marzán LM, Vuković L, Král P, Bals S, Klajn R. Tunable porous nanoallotropes prepared by post-assembly etching of binary nanoparticle superlattices. Science 2017; 358:514-518. [DOI: 10.1126/science.aan6046] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 09/21/2017] [Indexed: 01/03/2023]
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32
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Liu X, He M, Tian H, Liu B, Yang J. Separation of Au Nanoplates and Nanoparticles through Density Gradient Centrifugation. CHEM LETT 2017. [DOI: 10.1246/cl.170691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaofang Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Min He
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Hu Tian
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Bin Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Jianhui Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
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33
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Mozaffari S, Li W, Thompson C, Ivanov S, Seifert S, Lee B, Kovarik L, Karim AM. Colloidal nanoparticle size control: experimental and kinetic modeling investigation of the ligand-metal binding role in controlling the nucleation and growth kinetics. NANOSCALE 2017; 9:13772-13785. [PMID: 28885633 DOI: 10.1039/c7nr04101b] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Despite the major advancements in colloidal metal nanoparticles synthesis, a quantitative mechanistic treatment of the ligand's role in controlling their size remains elusive. We report a methodology that combines in situ small angle X-ray scattering (SAXS) and kinetic modeling to quantitatively capture the role of ligand-metal binding (with the metal precursor and the nanoparticle surface) in controlling the synthesis kinetics. We demonstrate that accurate extraction of the kinetic rate constants requires using both, the size and number of particles obtained from in situ SAXS to decouple the contributions of particle nucleation and growth to the total metal reduction. Using Pd acetate and trioctylphosphine in different solvents, our results reveal that the binding of ligands with both the metal precursor and nanoparticle surface play a key role in controlling the rates of nucleation and growth and consequently the final size. We show that the solvent can affect the metal-ligand binding and consequently ligand coverage on the nanoparticles surface which has a strong effect on the growth rate and final size (1.4 nm in toluene and 4.3 nm in pyridine). The proposed kinetic model quantitatively predicts the effects of varying the metal concentration and ligand/metal ratio on nanoparticle size for our work and literature reports. More importantly, we demonstrate that the final size is exclusively determined by the nucleation and growth kinetics at early times and not how they change with time. Specifically, the nanoparticle size in this work and many literature reports can be predicted using a single, model independent kinetic descriptor, (growth-to-nucleation rate ratio)1/3, despite the different metals and synthetic conditions. The proposed model and kinetic descriptor could serve as powerful tools for the design of colloidal nanoparticles with specific sizes.
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Affiliation(s)
- Saeed Mozaffari
- Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA.
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34
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Reiser B, Gerstner D, Gonzalez-Garcia L, Maurer JHM, Kanelidis I, Kraus T. Spinning Hierarchical Gold Nanowire Microfibers by Shear Alignment and Intermolecular Self-Assembly. ACS NANO 2017; 11:4934-4942. [PMID: 28445646 DOI: 10.1021/acsnano.7b01551] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hierarchical structures lend strength to natural fibers made of soft nanoscale building blocks. Intermolecular interactions connect the components at different levels of hierarchy, distribute stresses, and guarantee structural integrity under load. Here, we show that synthetic ultrathin gold nanowires with interacting ligand shells can be spun into biomimetic, free-standing microfibers. A solution spinning process first aligns the wires, then lets their ligand shells interact, and finally converts them into a hierarchical superstructure. The resulting fiber contained 80 vol % organic ligand but was strong enough to be removed from the solution, dried, and mechanically tested. Fiber strength depended on the wire monomer alignment. Shear in the extrusion nozzle was systematically changed to obtain process-structure-property relations. The degree of nanowire alignment changed breaking stresses by a factor of 1.25 and the elongation at break by a factor of 2.75. Plasma annealing of the fiber to form a solid metal shell decreased the breaking stress by 65%.
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Affiliation(s)
- Beate Reiser
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Dominik Gerstner
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Lola Gonzalez-Garcia
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Johannes H M Maurer
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Ioannis Kanelidis
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
| | - Tobias Kraus
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123 Saarbrücken, Germany
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35
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Sashuk V, Rogaczewski K. A halogen-free synthesis of gold nanoparticles using gold(III) oxide. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2016; 18:261. [PMID: 27642258 PMCID: PMC5003902 DOI: 10.1007/s11051-016-3576-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 08/20/2016] [Indexed: 06/01/2023]
Abstract
Gold nanoparticles are one of the most used nanomaterials. They are usually synthesized by the reduction of gold(III) chloride. However, the presence of halide ions in the reaction mixture is not always welcome. In some cases, these ions have detrimental influence on the morphology and structure of resulting nanoparticles. Here, we present a simple and halogen-free procedure to prepare gold nanoparticles by reduction of gold(III) oxide in neat oleylamine. The method provides the particles with an average size below 10 nm and dispersity of tens of percent. The process of nanoparticle formation was monitored using UV-Vis spectroscopy. The structure and chemical composition of the nanoparticles was determined by SEM, XPS and EDX. We also proposed the mechanism of reduction of gold(III) oxide based on MS, IR and NMR data. Importantly, the synthetic protocol is general and applicable for the preparation of other coinage metal nanoparticles from the corresponding metal oxides. For instance, we demonstrated that the absence of halogen enables efficient alloying of metals when preparing gold-silver bimetallic nanoparticles.
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Affiliation(s)
- Volodymyr Sashuk
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Konrad Rogaczewski
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
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36
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Kister T, Mravlak M, Schilling T, Kraus T. Pressure-controlled formation of crystalline, Janus, and core-shell supraparticles. NANOSCALE 2016; 8:13377-84. [PMID: 27340805 DOI: 10.1039/c6nr01940d] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Binary mixtures of nanoparticles self-assemble in the confinement of evaporating oil droplets and form regular supraparticles. We demonstrate that moderate pressure differences on the order of 100 kPa change the particles' self-assembly behavior. Crystalline superlattices, Janus particles, and core-shell particle arrangements form in the same dispersions when changing the working pressure or the surfactant that sets the Laplace pressure inside the droplets. Molecular dynamics simulations confirm that pressure-dependent interparticle potentials affect the self-assembly route of the confined particles. Optical spectrometry, small-angle X-ray scattering and electron microscopy are used to compare experiments and simulations and confirm that the onset of self-assembly depends on particle size and pressure. The overall formation mechanism reminds of the demixing of binary alloys with different phase diagrams.
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Affiliation(s)
- Thomas Kister
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.
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37
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Zhang X, Lv L, Ji L, Guo G, Liu L, Han D, Wang B, Tu Y, Hu J, Yang D, Dong A. Self-Assembly of One-Dimensional Nanocrystal Superlattice Chains Mediated by Molecular Clusters. J Am Chem Soc 2016; 138:3290-3. [DOI: 10.1021/jacs.6b00055] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xianfeng Zhang
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Longfei Lv
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Li Ji
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Guannan Guo
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Limin Liu
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Dandan Han
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Biwei Wang
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yaqi Tu
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Jianhua Hu
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Dong Yang
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Angang Dong
- Collaborative Innovation
Center of Chemistry for Energy Materials,
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
and Department of Chemistry and ‡State Key Laboratory of Molecular Engineering
of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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38
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Weng H, Liao F, Wang M, Lin M, Ge X. One-pot synthesis of porous Au-nanoparticles@polymer/reduced graphene oxide composite microspheres by γ-ray radiation and their application as a recyclable high-performance catalyst. RSC Adv 2016. [DOI: 10.1039/c6ra11205f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Au-nanoparticles-embedded porous polymer/reduced graphene oxide composite microspheres, with ultra-high catalytic efficiency and recyclability, were fabricated through γ-ray in one pot.
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Affiliation(s)
- Hanqin Weng
- School of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
- CAS Key Laboratory of Soft Matter Chemistry
| | - Fan Liao
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Mozhen Wang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Mingzhang Lin
- School of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Xuewu Ge
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
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39
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Reiser B, Gerstner D, Gonzalez-Garcia L, Maurer JHM, Kanelidis I, Kraus T. Multivalent bonds in self-assembled bundles of ultrathin gold nanowires. Phys Chem Chem Phys 2016; 18:27165-27169. [DOI: 10.1039/c6cp05181b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We describe solvent effects in the self-assembly of ultrathin gold nanowires and highlight the role of intermolecular ligand–solvent interactions.
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Affiliation(s)
- B. Reiser
- INM – Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
| | - D. Gerstner
- INM – Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
| | | | - J. H. M. Maurer
- INM – Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
| | - I. Kanelidis
- INM – Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
| | - T. Kraus
- INM – Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
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40
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Yuan LF, He YJ, Zhao H, Zhou Y, Gu P. Colorimetric detection of d-amino acids based on anti-aggregation of gold nanoparticles. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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41
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Wu B, Tang S, Chen M, Zheng N. Amphiphilic modification and asymmetric silica encapsulation of hydrophobic Au–Fe3O4dumbbell nanoparticles. Chem Commun (Camb) 2014; 50:174-6. [DOI: 10.1039/c3cc47634k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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