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Podlesnaia E, Gerald Inangha P, Vesenka J, Seyring M, Hempel HJ, Rettenmayr M, Csáki A, Fritzsche W. Microfluidic-Generated Seeds for Gold Nanotriangle Synthesis in Three or Two Steps. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2204810. [PMID: 36855325 DOI: 10.1002/smll.202204810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 01/23/2023] [Indexed: 06/02/2023]
Abstract
Nanoparticle synthesis has drawn great attention in the last decades. The study of crystal growth mechanisms and optimization of the existing methods lead to the increasing accessibility of nanomaterials, such as gold nanotriangles which have great potential in the fields of plasmonics and catalysis. To form such structures, a careful balance of reaction parameters has to be maintained. Herein, a novel synthesis of gold nanotriangles from seeds derived with a micromixer, which provides a highly efficient mixing and simple parameter control is reported. The impact of the implemented reactor on the primary seed characteristics is investigated. The following growth steps are studied to reveal the phenomena affecting the shape yield. The use of microfluidic seeds led to the formation of well-defined triangles with a narrower size distribution compared to the entirely conventional batch synthesis. A shortened two-step procedure for the formation of triangles directly from primary seeds, granting an express but robust synthesis is further described. Moreover, the need for a thorough study of seed crystallinity depending on the synthesis conditions, which - together with additional parameter optimization - will bring a new perspective to the use of micromixers which are promising for scaling up nanomaterial production is highlighted.
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Affiliation(s)
- Ekaterina Podlesnaia
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
| | - Princess Gerald Inangha
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
| | - James Vesenka
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
- School of Mathematical and Physical Sciences, University of New England, 11 Hills Beach Road, Biddeford, ME, 04005, USA
| | - Martin Seyring
- Department of Metallic Materials, Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University (FSU), Löbdergraben 32, 07743, Jena, Germany
- Faculty of Electrical Engineering, Schmalkalden University of Applied Sciences, Blechhammer 4-9, 98574, Schmalkalden, Germany
| | - Hans-Jürgen Hempel
- Department of Metallic Materials, Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University (FSU), Löbdergraben 32, 07743, Jena, Germany
| | - Markus Rettenmayr
- Department of Metallic Materials, Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University (FSU), Löbdergraben 32, 07743, Jena, Germany
| | - Andrea Csáki
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
| | - Wolfgang Fritzsche
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
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2
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Chan Park S, Ki Son H, Sharma G, Kim JC. Preparation of gold nanoparticles using monoolein cubic phase as a template. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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3
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Yu X, Wang Z, Cui H, Wu X, Chai W, Wei J, Chen Y, Zhang Z. A Review on Gold Nanotriangles: Synthesis, Self-Assembly and Their Applications. Molecules 2022; 27:8766. [PMID: 36557899 PMCID: PMC9783914 DOI: 10.3390/molecules27248766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/03/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Gold nanoparticles (AuNPs) with interesting optical properties have attracted much attention in recent years. The synthesis and plasmonic properties of AuNPs with a controllable size and shape have been extensively investigated. Among these AuNPs, gold nanotriangles (AuNTs) exhibited unique optical and plasmonic properties due to their special triangular anisotropy. Indeed, AuNTs showed promising applications in optoelectronics, optical sensing, imaging and other fields. However, only few reviews about these applications have been reported. Herein, we comprehensively reviewed the synthesis and self-assembly of AuNTs and their applications in recent years. The preparation protocols of AuNTs are mainly categorized into chemical synthesis, biosynthesis and physical-stimulus-induced synthesis. The comparison between the advantages and disadvantages of various synthetic strategies are discussed. Furthermore, the specific surface modification of AuNTs and their self-assembly into different dimensional nano- or microstructures by various interparticle interactions are introduced. Based on the unique physical properties of AuNTs and their assemblies, the applications towards chemical biology and sensing were developed. Finally, the future development of AuNTs is prospected.
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Affiliation(s)
| | | | | | | | | | - Jinjian Wei
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Yuqin Chen
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Zhide Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
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4
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Hernández-Cifre JG, Rodríguez-Schmidt R, Almagro-Gómez CM, García de la Torre J. Calculation of the friction, diffusion and sedimentation coefficients of nanoplatelets of arbitrary shape. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Rössle M, Leitenberger W, Reinhardt M, Koç A, Pudell J, Kwamen C, Bargheer M. The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:948-960. [PMID: 33950003 PMCID: PMC8127367 DOI: 10.1107/s1600577521002484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 03/05/2021] [Indexed: 06/07/2023]
Abstract
The time-resolved hard X-ray diffraction endstation KMC-3 XPP for optical pump/X-ray probe experiments at the electron storage ring BESSY II is dedicated to investigating the structural response of thin film samples and heterostructures after their excitation with ultrashort laser pulses and/or electric field pulses. It enables experiments with access to symmetric and asymmetric Bragg reflections via a four-circle diffractometer and it is possible to keep the sample in high vacuum and vary the sample temperature between ∼15 K and 350 K. The femtosecond laser system permanently installed at the beamline allows for optical excitation of the sample at 1028 nm. A non-linear optical setup enables the sample excitation also at 514 nm and 343 nm. A time-resolution of 17 ps is achieved with the `low-α' operation mode of the storage ring and an electronic variation of the delay between optical pump and hard X-ray probe pulse conveniently accesses picosecond to microsecond timescales. Direct time-resolved detection of the diffracted hard X-ray synchrotron pulses use a gated area pixel detector or a fast point detector in single photon counting mode. The range of experiments that are reliably conducted at the endstation and that detect structural dynamics of samples excited by laser pulses or electric fields are presented.
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Affiliation(s)
- Matthias Rössle
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Wolfram Leitenberger
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24–25, 14476 Potsdam, Germany
| | - Matthias Reinhardt
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Azize Koç
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Jan Pudell
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Christelle Kwamen
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Matias Bargheer
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24–25, 14476 Potsdam, Germany
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6
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Soto-Cruz J, Conejo-Valverde P, Sáenz-Arce G, Dou H, Rojas-Carrillo O. Biofabrication of Gold Nanotriangles Using Liposomes as a Dual Functional Reductant and Stabilizer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3446-3455. [PMID: 33683907 DOI: 10.1021/acs.langmuir.1c00104] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Negatively charged liposomes accomplished both functions as a reducing and stabilizing agent in the synthesis of gold nanotriangles (GNTs). Liposomes are based on a mixture of phospholipids phosphatidylcholine/phosphoglycerol, and they were used as a template phase to perform the GNTs. The method was evaluated under different conditions such as temperature, reaction time, phosphoglycerol chain length, and precursor concentration. Isotropic and anisotropic gold nanoparticles are formed simultaneously during the synthesis. Therefore, by combining centrifugation and depletion flocculation strategies, the sample was concentrated in terms of GNTs from 15% crude to 80% by using sodium dodecyl sulfate (SDS). As a result, a green colored dispersion was obtained containing highly purified, well-defined, negatively charged GNTs, where the edge length of most particles is centered in the range of 60-80 nm with an average thickness of 7.8 ± 0.1 nm. By this purification process, it was possible to highly increase the yield in terms of GNTs. Other surfactants [cetyltrimethylammonium chloride (CTAC), hexadecyltrimethylammonium bromide (CTAB), Tween 20, and dodecyldimethylammonium bromide] were evaluated during the purification stage, and both CTAB and CTAC show similar results to those obtained by using SDS. These GNTs are potential candidates for future applications in molecular imaging, photothermal therapy, drug delivery, biosensing, and photodynamic therapy.
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Affiliation(s)
- Jackeline Soto-Cruz
- Laboratorio de polímeros (POLIUNA), School of Chemistry, Universidad Nacional, Heredia 86-3000, Costa Rica
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Paolo Conejo-Valverde
- Laboratorio de polímeros (POLIUNA), School of Chemistry, Universidad Nacional, Heredia 86-3000, Costa Rica
| | | | - Hongjing Dou
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Oscar Rojas-Carrillo
- Laboratorio de polímeros (POLIUNA), School of Chemistry, Universidad Nacional, Heredia 86-3000, Costa Rica
- National Center for Biotechnological Innovations (CENIBiot), CeNAT-CONARE, San José 1174-1200, Costa Rica
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7
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Lee SB, Paek SM, Oh JM. Porous Hybrids Structure between Silver Nanoparticle and Layered Double Hydroxide for Surface-Enhanced Raman Spectroscopy. NANOMATERIALS 2021; 11:nano11020447. [PMID: 33578775 PMCID: PMC7916476 DOI: 10.3390/nano11020447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/05/2021] [Accepted: 02/07/2021] [Indexed: 12/13/2022]
Abstract
Silver nanoparticle (AgNP), in terms of antibacterial, catalytic, electronic, and optical applications, is an attractive material. Especially, when prepared to furnish sharp edge and systematic particle orientation on the substrate, AgNPs can take advantage of surface-enhanced Raman spectroscopy (SERS). In this research, we suggested a synthetic method to immobilize the AgNP on metal oxide by utilizing Ag-thiolate and layered double hydroxide (LDH) as precursor and template, respectively. The layer-by-layer structure of LDH and Ag-thiolate transformed through reductive calcination to metal oxide and AgNP array. Physicochemical characterization, including powder X-ray diffraction, N2 adsorption–desorption, microscopies, and X-ray photoelectron spectroscopy, revealed that the AgNP with sufficient crystallinity and particle gap was obtained at relatively high calcination temperature, ~600 °C. UV-vis diffusion reflectance spectroscopy showed that the calcination temperature affected particle size and electronic structure of AgNP. The prepared materials were subjected to SERS tests toward 4-nitrothiophenol (4-NTP). The sample obtained at 600 °C exhibited 50 times higher substrate enhancement factor (SEF) than the one obtained at 400 °C, suggesting that the calcination temperature was a determining parameter to enhance SERS activity in current synthetic condition.
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Affiliation(s)
- Su-Bin Lee
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Korea;
| | - Seung-Min Paek
- Department of Chemistry, Kyungpook National University, Daegu 41566, Korea
- Correspondence: (S.-M.P.); (J.-M.O.); Tel.: +82-53-950-5335 (S.-M.P.); +82-2-2260-4977 (J.-M.O.)
| | - Jae-Min Oh
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Korea;
- Correspondence: (S.-M.P.); (J.-M.O.); Tel.: +82-53-950-5335 (S.-M.P.); +82-2-2260-4977 (J.-M.O.)
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8
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Ortiz-Castillo JE, Gallo-Villanueva RC, Madou MJ, Perez-Gonzalez VH. Anisotropic gold nanoparticles: A survey of recent synthetic methodologies. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213489] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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Koetz J. The Effect of Surface Modification of Gold Nanotriangles for Surface-Enhanced Raman Scattering Performance. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2187. [PMID: 33147806 PMCID: PMC7694140 DOI: 10.3390/nano10112187] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 10/29/2020] [Indexed: 11/16/2022]
Abstract
A surface modification of ultraflat gold nanotriangles (AuNTs) with different shaped nanoparticles is of special relevance for surface-enhanced Raman scattering (SERS) and the photo-catalytic activity of plasmonic substrates. Therefore, different approaches are used to verify the flat platelet morphology of the AuNTs by oriented overgrowth with metal nanoparticles. The most important part for the morphological transformation of the AuNTs is the coating layer, containing surfactants or polymers. By using well established AuNTs stabilized by a dioctyl sodium sulfosuccinate (AOT) bilayer, different strategies of surface modification with noble metal nanoparticles are possible. On the one hand undulated superstructures were synthesized by in situ growth of hemispherical gold nanoparticles in the polyethyleneimine (PEI)-coated AOT bilayer of the AuNTs. On the other hand spiked AuNTs were obtained by a direct reduction of Au3+ ions in the AOT double layer in presence of silver ions and ascorbic acid as reducing agent. Additionally, crumble topping of the smooth AuNTs can be realized after an exchange of the AOT bilayer by hyaluronic acid, followed by a silver-ion mediated reduction with ascorbic acid. Furthermore, a decoration with silver nanoparticles after coating the AOT bilayer with the cationic surfactant benzylhexadecyldimethylammonium chloride (BDAC) can be realized. In that case the ultraviolet (UV)-absorption of the undulated Au@Ag nanoplatelets can be tuned depending on the degree of decoration with silver nanoparticles. Comparing the Raman scattering data for the plasmon driven dimerization of 4-nitrothiophenol (4-NTP) to 4,4'-dimercaptoazobenzene (DMAB) one can conclude that the most important effect of surface modification with a 75 times higher enhancement factor in SERS experiments becomes available by decoration with gold spikes.
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Affiliation(s)
- Joachim Koetz
- Institute for Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Haus 25, 14476 Potsdam, Germany
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10
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Henning R, Liebig F, Prietzel C, Klemke B, Koetz J. Gold nanotriangles with magnetite satellites. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Ramírez-Jiménez R, Artiga Á, Mitchell SG, Martín-Rapún R, de la Fuente JM. Surfactant-Free Synthesis and Scalable Purification of Triangular Gold Nanoprisms with Low Non-Specific Cellular Uptake. NANOMATERIALS 2020; 10:nano10030539. [PMID: 32192152 PMCID: PMC7153367 DOI: 10.3390/nano10030539] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 12/14/2022]
Abstract
Gold nanoprisms possess remarkable optical properties that make them useful for medical biotechnology applications such as diagnosis and photothermal therapy. However, shape-selective synthesis of gold nanoprisms is not trivial and typically requires either toxic surfactants or time-consuming purification protocols, which can limit their applicability. Here, we show how triangular gold nanoprisms of different sizes can be purified by precipitation using the non-toxic glutathione ligand, thereby removing the need for toxic surfactants and bottleneck purification techniques. The protocol is amenable for direct scaling up as no instrumentation is required in the critical purification step. The new purification method provides a two-fold increased yield in gold nanoprisms compared to electrophoretic filtration, while providing nanoprisms of similar localized surface plasmon resonance wavelength. Crucially, the gold nanoprisms isolated using this methodology show fewer non-specific interactions with cells and lower cellular internalization, which paves the way for a higher selectivity in therapeutic applications.
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Affiliation(s)
- Rafael Ramírez-Jiménez
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/ Pedro Cerbuna s/n, 50009 Zaragoza, Spain; (R.R.-J.); (S.G.M.)
- Centro de Investigación Biomédica en Red in Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Álvaro Artiga
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/ Pedro Cerbuna s/n, 50009 Zaragoza, Spain; (R.R.-J.); (S.G.M.)
- Centro de Investigación Biomédica en Red in Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Scott G. Mitchell
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/ Pedro Cerbuna s/n, 50009 Zaragoza, Spain; (R.R.-J.); (S.G.M.)
- Centro de Investigación Biomédica en Red in Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Rafael Martín-Rapún
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/ Pedro Cerbuna s/n, 50009 Zaragoza, Spain; (R.R.-J.); (S.G.M.)
- Centro de Investigación Biomédica en Red in Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Instituto de Nanociencia de Aragón, Depto. Química Orgánica (Universidad de Zaragoza), c/ Mariano Esquillor s/n, 50018 Zaragoza, Spain
- Correspondence: (R.M.-R.); (J.M.d.l.F.)
| | - Jesús M. de la Fuente
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/ Pedro Cerbuna s/n, 50009 Zaragoza, Spain; (R.R.-J.); (S.G.M.)
- Centro de Investigación Biomédica en Red in Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Correspondence: (R.M.-R.); (J.M.d.l.F.)
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12
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Liebig F, Sarhan RM, Schmitt CNZ, Thünemann AF, Prietzel C, Bargheer M, Koetz J. Gold Nanotriangles with Crumble Topping and their Influence on Catalysis and Surface-Enhanced Raman Spectroscopy. Chempluschem 2020; 85:519-526. [PMID: 31961045 DOI: 10.1002/cplu.201900745] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/20/2020] [Indexed: 12/12/2022]
Abstract
By adding hyaluronic acid (HA) to dioctyl sodium sulfosuccinate (AOT)-stabilized gold nanotriangles (AuNTs) with an average thickness of 7.5±1 nm and an edge length of about 175±17 nm, the AOT bilayer is replaced by a polymeric HA-layer leading to biocompatible nanoplatelets. The subsequent reduction process of tetrachloroauric acid in the HA-shell surrounding the AuNTs leads to the formation of spherical gold nanoparticles on the platelet surface. With increasing tetrachloroauric acid concentration, the decoration with gold nanoparticles can be tuned. SAXS measurements reveal an increase of the platelet thickness up to around 14.5 nm, twice the initial value of bare AuNTs. HRTEM micrographs show welding phenomena between densely packed particles on the platelet surface, leading to a crumble formation while preserving the original crystal structure. Crumbles crystallized on top of the platelets enhance the Raman signal by a factor of around 20, and intensify the plasmon-driven dimerization of 4-nitrothiophenol (4-NTP) to 4,4'-dimercaptoazobenzene in a yield of up to 50 %. The resulting crumbled nanotriangles, with a biopolymer shell and the absorption maximum in the second window for in vivo imaging, are promising candidates for biomedical sensing.
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Affiliation(s)
- Ferenc Liebig
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Haus 25, 14476, Potsdam, Germany
| | - Radwan M Sarhan
- Chemistry Department Faculty of Science, Cairo University, Cairo, 12613, Egypt.,Institute of Physics, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Haus 27, 14476, Potsdam, Germany.,Humboldt-Universität zu Berlin, School of Analytical Sciences Adlershof (SALSA), Albert-Einstein-Str. 5-9, 10099, Berlin, Germany
| | - Clemens N Z Schmitt
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany
| | - Andreas F Thünemann
- Anstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205, Berlin, Germany
| | - Claudia Prietzel
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Haus 25, 14476, Potsdam, Germany
| | - Matias Bargheer
- Institute of Physics, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Haus 27, 14476, Potsdam, Germany
| | - Joachim Koetz
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, Haus 25, 14476, Potsdam, Germany
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13
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Liebig F, Sarhan RM, Bargheer M, Schmitt CNZ, Poghosyan AH, Shahinyan AA, Koetz J. Spiked gold nanotriangles: formation, characterization and applications in surface-enhanced Raman spectroscopy and plasmon-enhanced catalysis. RSC Adv 2020; 10:8152-8160. [PMID: 35497869 PMCID: PMC9050016 DOI: 10.1039/d0ra00729c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 02/12/2020] [Indexed: 11/21/2022] Open
Abstract
We show the formation of metallic spikes on the surface of gold nanotriangles (AuNTs) by using the same reduction process which has been used for the synthesis of gold nanostars. We confirm that silver nitrate operates as a shape-directing agent in combination with ascorbic acid as the reducing agent and investigate the mechanism by dissecting the contribution of each component, i.e., anionic surfactant dioctyl sodium sulfosuccinate (AOT), ascorbic acid (AA), and AgNO3. Molecular dynamics (MD) simulations show that AA attaches to the AOT bilayer of nanotriangles, and covers the surface of gold clusters, which is of special relevance for the spike formation process at the AuNT surface. The surface modification goes hand in hand with a change of the optical properties. The increased thickness of the triangles and a sizeable fraction of silver atoms covering the spikes lead to a blue-shift of the intense near infrared absorption of the AuNTs. The sponge-like spiky surface increases both the surface enhanced Raman scattering (SERS) cross section of the particles and the photo-catalytic activity in comparison with the unmodified triangles, which is exemplified by the plasmon-driven dimerization of 4-nitrothiophenol (4-NTP) to 4,4′-dimercaptoazobenzene (DMAB). We show the formation of metallic spikes on the surface of gold nanotriangles (AuNTs) by using the same reduction process which has been used for the synthesis of gold nanostars leading to a higher SERS enhancement by a factor of 75.![]()
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Affiliation(s)
- Ferenc Liebig
- Institute for Chemistry
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Radwan M. Sarhan
- Chemistry Department
- Faculty of Science
- Cairo University
- Cairo 12613
- Egypt
| | - Matias Bargheer
- Institute for Physics
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Clemens N. Z. Schmitt
- Department of Biomaterials
- Max Planck Institute of Colloids and Interfaces
- 14476 Potsdam
- Germany
| | - Armen H. Poghosyan
- International Scientific-Educational Center of National Academy of Sciences
- 0019 Yerevan
- Armenia
| | - Aram A. Shahinyan
- International Scientific-Educational Center of National Academy of Sciences
- 0019 Yerevan
- Armenia
| | - Joachim Koetz
- Institute for Chemistry
- University of Potsdam
- 14476 Potsdam
- Germany
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14
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Mondal B, Bhanja SK, Tripathy T. Simultaneous Electrochemical Sensing of
p
‐Aminophenol and Hydroquinone by Using Grafted
Tricholoma
Mushroom Polysaccharide/Gold Composite Nanoparticles in Aqueous Media. ChemistrySelect 2019. [DOI: 10.1002/slct.201901772] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Barun Mondal
- Postgraduate Division of ChemistryMidnapore College (Autonomous), Midnapore, Paschim Medinipur 721101, West Bengal India
| | - Sunil K. Bhanja
- Department of chemistryGovernment General Degree College, Kharagpur-II, Paschim Medinipur 721149, West Bengal India
| | - Tridib Tripathy
- Postgraduate Division of ChemistryMidnapore College (Autonomous), Midnapore, Paschim Medinipur 721101, West Bengal India
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15
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Requejo KI, Liopo AV, Derry PJ, Zubarev ER. Improving the Shape Yield and Long-Term Stability of Gold Nanoprisms with Poly(vinylpyrrolidone). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9777-9784. [PMID: 31290673 DOI: 10.1021/acs.langmuir.9b00794] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Gold nanoprisms (AuNPRs) are anisotropic nanostructures that have gained great attention in recent years because of their interesting and unique optical properties that can be tailored for biomedical, energy, and sensing applications. At present, several protocols have reported the high yield synthesis of AuNPRs of different dimensions using a seed-mediated approach. However, there is a need to develop reproducible and scalable methods with the goal of a controllable synthesis. Here, we report an improved seed-mediated synthesis of small monodisperse AuNPRs of distinct sizes in high yield using poly(vinylpyrrolidone) (PVP) as an additive in nanomolar concentrations. We show optimal synthetic parameters for a blue-shifting of the surface plasmon resonance band which correlates with the reduction in the edge length (L) of AuNPRs from 75 to 35 nm. Using measured extinction coefficients for AuNPRs of different sizes, a linear equation is proposed to estimate the concentration of unknown samples by using Beer's law. Interestingly, the use of nanomolar amounts of PVP during the growth of AuNPRs significantly improves the shape yield. The surface chemistry properties of AuNPRs were measured by X-ray photoelectron spectroscopy and attenuated total reflectance infrared spectroscopy and revealed that PVP chains interact with AuNPRs through the carbonyl oxygen. This method is reproducible and scalable and enables the synthesis of AuNPRs with long-term shape stability (1 year) in aqueous solution.
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Affiliation(s)
- Katherinne I Requejo
- Department of Chemistry , Rice University , 6100 S Main Street Houston , Texas 77005 , United States
| | - Anton V Liopo
- Department of Chemistry , Rice University , 6100 S Main Street Houston , Texas 77005 , United States
| | - Paul J Derry
- Department of Chemistry , Rice University , 6100 S Main Street Houston , Texas 77005 , United States
| | - Eugene R Zubarev
- Department of Chemistry , Rice University , 6100 S Main Street Houston , Texas 77005 , United States
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16
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The influence of the shape of Au nanoparticles on the catalytic current of fructose dehydrogenase. Anal Bioanal Chem 2019; 411:7645-7657. [PMID: 31286179 PMCID: PMC6881425 DOI: 10.1007/s00216-019-01944-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/08/2019] [Accepted: 05/24/2019] [Indexed: 11/02/2022]
Abstract
Graphite electrodes were modified with triangular (AuNTrs) or spherical (AuNPs) nanoparticles and further modified with fructose dehydrogenase (FDH). The present study reports the effect of the shape of these nanoparticles (NPs) on the catalytic current of immobilized FDH pointing out the different contributions on the mass transfer-limited and kinetically limited currents. The influence of the shape of the NPs on the mass transfer-limited and the kinetically limited current has been proved by using two different methods: a rotating disk electrode (RDE) and an electrode mounted in a wall jet flow-through electrochemical cell attached to a flow system. The advantages of using the wall jet flow system compared with the RDE system for kinetic investigations are as follows: no need to account for substrate consumption, especially in the case of desorption of enzyme, and studies of product-inhibited enzymes. The comparison reveals that virtually identical results can be obtained using either of the two techniques. The heterogeneous electron transfer (ET) rate constants (kS) were found to be 3.8 ± 0.3 s-1 and 0.9 ± 0.1 s-1, for triangular and spherical NPs, respectively. The improvement observed for the electrode modified with AuNTrs suggests a more effective enzyme-NP interaction, which can allocate a higher number of enzyme molecules on the electrode surface. Graphical abstract The shape of gold nanoparticles has a crucial effect on the catalytic current related to the oxidation of D-(-)-fructose to 5-keto-D-(-)-fructose occurring at the FDH-modified electrode surface. In particular, AuNTrs have a higher effect compared with the spherical one.
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17
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Zhao C, Wang G, Takarada T, Liang X, Komiyama M, Maeda M. Shape-selective isolation of Au nanoplates from complex colloidal media by depletion flocculation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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Peptide generated anisotropic gold nanoparticles as efficient siRNA vectors. Int J Pharm 2019; 563:198-207. [PMID: 30953762 DOI: 10.1016/j.ijpharm.2019.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/11/2019] [Accepted: 04/02/2019] [Indexed: 12/18/2022]
Abstract
Based on the cell penetrating ability of tryptophan-containing peptides, eight linear hexapeptides have been designed, synthesized and explored their efficiency toward the synthesis of gold nanoparticles under sunlight. The peptide generated gold nanoparticles (LP-GNPs) have been characterized by UV-visible spectroscopy, Transmission Electron Microscopy (TEM) and Dynamic Light Scattering (DLS) techniques. The binding ability of LP-GNPs toward siRNA, evaluated by gel electrophoresis indicates that sequence-selective-GNPs without any surface modifications exhibit strong affinity toward negatively charged biomolecules. Cellular uptake studies suggest that LP-GNPs exhibit significant uptake of fluorescence-labeled siRNA inside the cells as evidenced from Fluorescence Microscopy. In vitro gene silencing efficiency using newly generated GNPs revealed that above mentioned LP-GNPs efficiently down-regulate the level of GAPGH gene in colon cancer cells. Comparative gene silencing efficiency results indicate that anisotropic LP7-GNPs exhibit comparable efficacy to other existing carrier systems, such as Lipofectamine 2000 in presence of serum, mimicking in-vivo system. In conclusion, our results demonstrate that peptide-GNPs based delivery system for siRNA emerges to be effective to deliver RNAi therapeutics, uncovering new avenue in oncotherapy.
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19
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Induced rapid magnetic sedimentation of stabilized-Fe3O4 nanoparticles by bridging and depletion flocculation. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2018.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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20
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Poghosyan AH, Adamyan MP, Shahinyan AA, Koetz J. AOT Bilayer Adsorption on Gold Surfaces: A Molecular Dynamics Study. J Phys Chem B 2019; 123:948-953. [PMID: 30620593 DOI: 10.1021/acs.jpcb.8b11471] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A molecular dynamics study was done to reveal the adsorption properties of sodium dioctyl sulfosuccinate (AOT) bilayers on gold Au(111) surfaces. Examining the rotational mobility of AOT molecules, we track that the correlation time of AOT molecules on the adsorbed layer is much higher. The data estimating the diffusive motion of AOT molecule show a substantially lower rate of diffusion (∼10-10 cm2/s) in the adsorbed layers in comparison to other ones. The results show that an adsorbed layer is more rigid, whereas the outer layers undergo considerable lateral and vertical fluctuations.
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Affiliation(s)
- Armen H Poghosyan
- International Scientific-Educational Center of National Academy of Sciences , M. Baghramyan Ave. 24d , 0019 Yerevan , Armenia
| | - Maksim P Adamyan
- National Polytechnic University of Armenia , Teryan str. 105 , 0009 Yerevan , Armenia
| | - Aram A Shahinyan
- International Scientific-Educational Center of National Academy of Sciences , M. Baghramyan Ave. 24d , 0019 Yerevan , Armenia
| | - Joachim Koetz
- Institut für Chemie , Universität Potsdam , Karl-Liebknecht-Straße 24-25 , 14476 Potsdam , Germany
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21
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Miyagawa M, Usui M, Imura Y, Kuwahara S, Sugai T, Tanaka H. Aqueous synthesis of protectant-free copper nanocubes by a disproportionation reaction of Cu 2O on synthetic saponite. Chem Commun (Camb) 2018; 54:8454-8457. [PMID: 29808193 DOI: 10.1039/c8cc03182g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Here, we report a synthesis of Cu nanocubes by photoreduction of CuSO4. Because synthetic saponite (one of the layered clay minerals) was used as the adsorbent, the nanocubes contained no capping agents or protectants, and the disproportionation reaction of Cu2O with H2SO4 was found to be the key for morphological control.
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Affiliation(s)
- Masaya Miyagawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, Japan.
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22
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Self-assembled monolayer formation of distorted cylindrical AOT micelles on gold surfaces. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.067] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Das R, Soni RK. Rhodium nanocubes and nanotripods for highly sensitive ultraviolet surface-enhanced Raman spectroscopy. Analyst 2018; 143:2310-2322. [PMID: 29687108 DOI: 10.1039/c8an00341f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report the shape- and wavelength-dependent ultrasensitive label-free detection of adenine on rhodium cube- and tripod-star-like nanoparticles (Rh NPs) using ultraviolet surface-enhanced Raman scattering (UV-SERS). Rh NPs immobilized on a silane-treated glass substrate probed at near-resonant and non-resonant wavelengths served as the SERS platform for the highly reproducible, stable, and real-time detection of adsorbed adenine molecules in the femtomolar region. The sensitivity of SERS-active Rh NPs displaying LSPR in the UV region was exploited for the 266 nm (DUV), 325 nm (UV) and 532 nm (visible) Raman excitation wavelengths. With the 266 nm and 325 nm DUV-UV excitation lines, for the Rh tripod geometry near or pre-resonant excitation being closer to the analyte absorption band combined with the intrinsic UV-LSPR resonant energy produced a SERS enhancement factor as high as 105 and accelerated photoinduced degradations compared to 532 nm for our substrates. Computational results consistent with the experiment clearly demonstrated that the NP SERS enhancement was sensitive to both the intrinsic optical properties of Rh in the UV region and the excitation closer to the LSPR peak producing larger EM enhancements. The wavelength-dependent correlations between the optical properties of the shape-tailored Rh NPs and SERS enhancements envisage the merit and demerit of DUV-UV excitation over visible excitation for Raman measurements. The as-fabricated SERS substrate could also be efficiently recycled using O2 plasma for the detection of other biomolecules. The use of oxide-free transition metal Rh and DUV-UV excitation thereby extends the improved generality of the SERS technique for ultrasensitive bimolecular detection and for gaining a comprehensive understanding of UV-SERS-based applications.
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Affiliation(s)
- Rupali Das
- Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
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24
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Liebig F, Henning R, Sarhan RM, Prietzel C, Bargheer M, Koetz J. A new route to gold nanoflowers. NANOTECHNOLOGY 2018; 29:185603. [PMID: 29451134 DOI: 10.1088/1361-6528/aaaffd] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Catanionic vesicles spontaneously formed by mixing the anionic surfactant bis(2-ethylhexyl) sulfosuccinate sodium salt with the cationic surfactant cetyltrimethylammonium bromide were used as a reducing medium to produce gold clusters, which are embedded and well-ordered into the template phase. The gold clusters can be used as seeds in the growth process that follows by adding ascorbic acid as a mild reducing component. When the ascorbic acid was added very slowly in an ice bath round-edged gold nanoflowers were produced. When the same experiments were performed at room temperature in the presence of Ag+ ions, sharp-edged nanoflowers could be synthesized. The mechanism of nanoparticle formation can be understood to be a non-diffusion-limited Ostwald ripening process of preordered gold nanoparticles embedded in catanionic vesicle fragments. Surface-enhanced Raman scattering experiments show an excellent enhancement factor of 1.7 · 105 for the nanoflowers deposited on a silicon wafer.
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Affiliation(s)
- Ferenc Liebig
- Institute for Chemistry, University of Potsdam, 14476 Potsdam, Germany
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25
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Toxicological investigations of "naked" and polymer-entrapped AOT-based gold nanotriangles. Colloids Surf B Biointerfaces 2018; 167:560-567. [PMID: 29734066 DOI: 10.1016/j.colsurfb.2018.04.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/11/2018] [Accepted: 04/28/2018] [Indexed: 02/02/2023]
Abstract
Negatively charged ultrathin gold nanotriangles (AuNTs) were synthesized in a vesicular dioctyl sodium sulfosuccinate (AOT)/phospholipid-based template phase. These "naked" AuNTs with localized surface plasmon resonances in the NIR region at about 1300 nm and special photothermal properties are of particular interest for imaging and hyperthermia of cancerous tissues. For these kinds of applications the toxicity and the cellular uptake of the AuNTs is of outstanding importance. Therefore, this study focuses on the toxicity of "naked" AOT-stabilized AuNTs compared to polymer-coated AuNTs. Polymeric coating consisted of non-modified hyperbranched poly(ethyleneimine) (PEI), maltose-modified poly(ethyleneimine) (PEI-Mal) and heparin. The toxicological experiments were carried out with two different cell lines (embryonic kidney carcinoma cell line HEK293T and NK-cell leukemia cell line YTS). This study revealed that the heparin-coating of AuNTs improved biocompatibility by a factor of 50 when compared to naked AuNTs. Of note, the highest nontoxic concentration of the AuNTs coated with PEI and PEI-Mal is drastically decreased. Overall, this is mainly triggered by the different surface charges of polymeric coatings. Therefore, AuNTs coated with heparin were selected to carry out uptake studies. Their promising high biocompatibility and cellular uptake may open future studies in the field of biomedical applications.
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26
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Liebig F, Sarhan RM, Prietzel C, Thünemann AF, Bargheer M, Koetz J. Undulated Gold Nanoplatelet Superstructures: In Situ Growth of Hemispherical Gold Nanoparticles onto the Surface of Gold Nanotriangles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4584-4594. [PMID: 29617144 DOI: 10.1021/acs.langmuir.7b02898] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Negatively charged flat gold nanotriangles, formed in a vesicular template phase and separated by an AOT-micelle-based depletion flocculation, were reloaded by adding a cationic polyelectrolyte, that is, a hyperbranched polyethylenimine (PEI). Heating the system to 100 °C in the presence of a gold chloride solution, the reduction process leads to the formation of gold nanoparticles inside the polymer shell surrounding the nanoplatelets. The gold nanoparticle formation is investigated by UV-vis spectroscopy, small-angle X-ray scattering, and dynamic light scattering measurements in combination with transmission electron microscopy. Spontaneously formed gold clusters in the hyperbranched PEI shell with an absorption maximum at 350 nm grow on the surface of the nanotriangles as hemispherical particles with diameters of ∼6 nm. High-resolution micrographs show that the hemispherical gold particles are crystallized onto the {111} facets on the bottom and top of the platelet as well as on the edges without a grain boundary. Undulated gold nanoplatelet superstructures with special properties become available, which show a significantly modified performance in SERS-detected photocatalysis regarding both reactivity and enhancement factor.
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Affiliation(s)
| | - Radwan M Sarhan
- School of Analytical Sciences Adlershof (SALSA) , Humboldt-Universität zu Berlin , 10099 Berlin , Germany
| | | | - Andreas F Thünemann
- Bundesanstalt für Materialforschung und -prüfung (BAM) , Unter den Eichen 87 , 12205 Berlin , Germany
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27
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Kuttner C, Mayer M, Dulle M, Moscoso A, López-Romero JM, Förster S, Fery A, Pérez-Juste J, Contreras-Cáceres R. Seeded Growth Synthesis of Gold Nanotriangles: Size Control, SAXS Analysis, and SERS Performance. ACS APPLIED MATERIALS & INTERFACES 2018; 10:11152-11163. [PMID: 29498508 DOI: 10.1021/acsami.7b19081] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We studied the controlled growth of triangular prismatic Au nanoparticles with different beveled sides for surface-enhanced Raman spectroscopy (SERS) applications. First, in a seedless synthesis using 3-butenoic acid (3BA) and benzyldimethylammonium chloride (BDAC), gold nanotriangles (AuNTs) were synthesized in a mixture with gold nanooctahedra (AuNOCs) and separated by depletion-induced flocculation. Here, the influence of temperature, pH, and reducing agent on the reaction kinetics was initially investigated by UV-vis and correlated to the size and yield of AuNT seeds. In a second step, the AuNT size was increased by seed-mediated overgrowth with Au. We show for the first time that preformed 3BA-synthesized AuNT seeds can be overgrown up to a final edge length of 175 nm and a thickness of 80 nm while maintaining their triangular shape and tip sharpness. The NT morphology, including edge length, thickness, and tip rounding, was precisely characterized in dispersion by small-angle X-ray scattering and in dry state by transmission electron microscopy and field-emission scanning electron microscopy. For sensor purposes, we studied the size-dependent SERS performance of AuNTs yielding analytical enhancement factors between 0.9 × 104 and 5.6 × 104 and nanomolar limit of detection (10-8-10-9 M) for 4-mercaptobenzoic acid and BDAC. These results confirm that the 3BA approach allows the fabrication of AuNTs in a whole range of sizes maintaining the NT morphology. This enables tailoring of localized surface plasmon resonances between 590 and 740 nm, even in the near-infrared window of a biological tissue, for use as colloidal SERS sensing agents or for optoelectronic applications.
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Affiliation(s)
- Christian Kuttner
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
- Cluster of Excellence Centre for Advancing Electronics Dresden (cfaed) , Technische Universität Dresden , 01062 Dresden , Germany
| | - Martin Mayer
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
- Cluster of Excellence Centre for Advancing Electronics Dresden (cfaed) , Technische Universität Dresden , 01062 Dresden , Germany
| | - Martin Dulle
- Jülich Centre for Neutron Science (JCNS-1) and Institute for Complex Systems (ICS-1) , Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
| | - Ana Moscoso
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Málaga , 29071 Málaga , Spain
| | - Juan Manuel López-Romero
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Málaga , 29071 Málaga , Spain
| | - Stephan Förster
- Jülich Centre for Neutron Science (JCNS-1) and Institute for Complex Systems (ICS-1) , Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
- Cluster of Excellence Centre for Advancing Electronics Dresden (cfaed) , Technische Universität Dresden , 01062 Dresden , Germany
- Physical Chemistry of Polymeric Materials , Technische Universität Dresden , 01069 Dresden , Germany
| | - Jorge Pérez-Juste
- Departamento de Química Física, CINBIO , Universidade de Vigo and IBIV , 36310 Vigo , Spain
| | - Rafael Contreras-Cáceres
- Leibniz-Institut für Polymerforschung Dresden e.V. , Hohe Str. 6 , 01069 Dresden , Germany
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Málaga , 29071 Málaga , Spain
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28
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Wu TJ, Chiu HY, Yu J, Cautela MP, Sarmento B, das Neves J, Catala C, Pazos-Perez N, Guerrini L, Alvarez-Puebla RA, Vranješ-Đurić S, Ignjatović NL. Nanotechnologies for early diagnosis, in situ disease monitoring, and prevention. NANOTECHNOLOGIES IN PREVENTIVE AND REGENERATIVE MEDICINE 2018. [PMCID: PMC7156018 DOI: 10.1016/b978-0-323-48063-5.00001-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nanotechnology is an enabling technology with great potential for applications in stem cell research and regenerative medicine. Fluorescent nanodiamond (FND), an inherently biocompatible and nontoxic nanoparticle, is well suited for such applications. We had developed a prospective isolation method using CD157, CD45, and CD54 to obtain lung stem cells. Labeling of CD45−CD54+CD157+ cells with FNDs did not eliminate their abilities for self-renewal and differentiation. The FND labeling in combination with cell sorting, fluorescence lifetime imaging microscopy, and immunostaining identified transplanted stem cells allowed tracking of their engraftment and regenerative capabilities with single-cell resolution. Time-gated fluorescence (TGF) imaging in mouse tissue sections indicated that they reside preferentially at the bronchoalveolar junctions of lungs, especially in naphthalene-injured mice. Our results presented in Subchapter 1.1 demonstrate not only the remarkable homing capacity and regenerative potential of the isolated stem cells, but also the ability of finding rare lung stem cells in vivo using FNDs. The topical use of antiretroviral-based microbicides, namely of a dapivirine ring, has been recently shown to partially prevent transmission of HIV through the vaginal route. Among different formulation approaches, nanotechnology tools and principles have been used for the development of tentative vaginal and rectal microbicide products. Subchapter 1.2 provides an overview of antiretroviral drug nanocarriers as novel microbicide candidates and discusses recent and relevant research on the topic. Furthermore, advances in developing vaginal delivery platforms for the administration of promising antiretroviral drug nanocarriers are reviewed. Although mostly dedicated to the discussion of nanosystems for vaginal use, the development of rectal nanomicrobicides is also addressed. Infectious diseases are currently responsible for over 8 million deaths per year. Efficient treatments require accurate recognition of pathogens at low concentrations, which in the case of blood infection (septicemia) can go as low as 1 mL–1. Detecting and quantifying bacteria at such low concentrations is challenging and typically demands cultures of large samples of blood (∼1 mL) extending over 24–72 h. This delay seriously compromises the health of patients and is largely responsible for the death toll of bacterial infections. Recent advances in nanoscience, spectroscopy, plasmonics, and microfluidics allow for the development of optical devices capable of monitoring minute amounts of analytes in liquid samples. In Subchapter 1.3 we critically discuss these recent developments that will, in the future, enable the multiplex identification and quantification of microorganisms directly on their biological matrix with unprecedented speed, low cost, and sensitivity. Radiolabeled nanoparticles (NPs) are finding an increasing interest in a broad range of biomedical applications. They may be used to detect and characterize diseases, to deliver relevant therapeutics, and to study the pharmacokinetic/pharmacodynamic parameters of nanomaterials. The use of radiotracer techniques in the research of novel NPs offers many advantages, but there are still some limitations. The binding of radionuclides to NPs has to be irreversible to prevent their escape to other tissues or organs. Due to the short half-lives of radionuclides, the manufacturing process is time limited and difficult, and there is also a risk of contamination. Subchapter 1.4 presents the main selection criteria for radionuclides and applicable radiolabeling procedures used for the radiolabeling of various NPs. Also, an overview of different types of NPs that have so far been labeled with radionuclides is presented.
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Affiliation(s)
- Tsai-Jung Wu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Kuei Shang, Taiwan
| | - Hsiao-Yu Chiu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Kuei Shang, Taiwan,China Medical University, Taichung, Taiwan
| | - John Yu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Kuei Shang, Taiwan,Institute of Cellular and Organismic Biology, Taipei, Taiwan
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29
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Liebig F, Sarhan RM, Sander M, Koopman W, Schuetz R, Bargheer M, Koetz J. Deposition of Gold Nanotriangles in Large Scale Close-Packed Monolayers for X-ray-Based Temperature Calibration and SERS Monitoring of Plasmon-Driven Catalytic Reactions. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20247-20253. [PMID: 28535039 DOI: 10.1021/acsami.7b07231] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Anisotropic plasmonic particles such as gold nanotriangles have extraordinary structural, optical, and physicochemical properties. For many applications in different fields, it is essential to prepare them in a chemically and physically stable, structurally well-defined manner, e.g., as large and uniform coverage on a substrate. We present a direct method for the large scale close-packed monolayer formation of edge-to-edge ordered, ultrathin crystalline gold nanotriangles on Si wafers or quartz glass via the transfer of these asymmetric particles to the air-liquid interface after adding ethanol-toluene mixtures without any subsequent surface functionalization. X-ray diffraction monitoring of the close-packed, large area monolayer with a mosaicity of less than 0.1° allows for calibrating the temperature of the particles during continuous laser heating. This is important for characterizing the microscopic temperature of the metal particles in the plasmon-driven dimerization process of 4-nitrothiophenol (4-NTP) into 4,4'-dimercaptoazobenzene (DMAB), monitored in real time by surface-enhanced Raman scattering (SERS). The gold nanotriangles can act as a source of hot electrons and initiate the dimerization process.
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Affiliation(s)
| | - Radwan M Sarhan
- Chemistry Department, Faculty of Science, Cairo University , Cairo 12613, Egypt
- School of Analytical Sciences Adlershof (SALSA), Humboldt-Universität zu Berlin , Albert-Einstein-Str. 5-9, 10099 Berlin, Germany
| | | | | | - Roman Schuetz
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam, Germany
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30
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Das R, Soni RK. Synthesis and surface-enhanced Raman scattering of indium nanotriangles and nanowires. RSC Adv 2017. [DOI: 10.1039/c7ra03317f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Indium nano-wires and -triangles are synthesizedviaa modified polyol reduction method and self-assembled on silane treated glass coverslips as SERS substrates, giving large Raman signal enhancement from adsorbed tryptophan molecules under non-resonant excitation at 632.8 nm.
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Affiliation(s)
- Rupali Das
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi
- India
| | - R. K. Soni
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi
- India
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31
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Liebig F, Thünemann AF, Koetz J. Ostwald Ripening Growth Mechanism of Gold Nanotriangles in Vesicular Template Phases. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10928-10935. [PMID: 27696870 DOI: 10.1021/acs.langmuir.6b02662] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The mechanism of nanotriangle formation in multivesicular vesicles (MMV) is investigated by using time-dependent SAXS measurements in combination with UV-vis spectroscopy, light, and transmission electron microscopy. In the first time period 6.5 nm sized spherical gold nanoparticles are formed inside of the vesicles, which build up soft nanoparticle aggregates. In situ SAXS experiments show a linear increase of the volume and molar mass of nanotriangles in the second time period. The volume growth rate of the triangles is 16.1 nm3/min, and the growth rate in the vertical direction is only 0.02 nm/min. Therefore, flat nanotriangles with a thickness of 7 nm and a diameter of 23 nm are formed. This process can be described by a diffusion-limited Ostwald ripening growth mechanism. TEM micrographs visualize soft coral-like structures with thin nanoplatelets at the periphery of the aggregates, which disaggregate in the third time period into nanotriangles and spherical particles. The 16 times faster growth of nanotriangles in the lateral than that in the vertical direction is related to the adsorption of symmetry breaking components, i.e., AOT and the polyampholyte PalPhBisCarb, on the {111} facets of the gold nanoplatelets in combination with confinement effects of the vesicular template phase.
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Affiliation(s)
- Ferenc Liebig
- Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, Haus 25, 14476 Potsdam, Golm, Germany
| | - Andreas F Thünemann
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Joachim Koetz
- Institut für Chemie, Universität Potsdam , Karl-Liebknecht-Strasse 24-25, Haus 25, 14476 Potsdam, Golm, Germany
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Schulze N, Koetz J. Kinetically controlled growth of gold nanotriangles in a vesicular template phase by adding a strongly alternating polyampholyte. J DISPER SCI TECHNOL 2016. [DOI: 10.1080/01932691.2016.1220318] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- N. Schulze
- University of Potsdam, Institute of Chemistry, Potsdam, Germany
| | - J. Koetz
- University of Potsdam, Institute of Chemistry, Potsdam, Germany
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33
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Schulze N, Prietzel C, Koetz J. Polyampholyte-mediated synthesis of anisotropic gold nanoplatelets. Colloid Polym Sci 2016. [DOI: 10.1007/s00396-016-3890-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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