1
|
Carambia A, Freund B, Schwinge D, Bruns OT, Salmen SC, Ittrich H, Reimer R, Heine M, Huber S, Waurisch C, Eychmüller A, Wraith DC, Korn T, Nielsen P, Weller H, Schramm C, Lüth S, Lohse AW, Heeren J, Herkel J. Nanoparticle-based autoantigen delivery to Treg-inducing liver sinusoidal endothelial cells enables control of autoimmunity in mice. J Hepatol 2015; 62:1349-56. [PMID: 25617499 DOI: 10.1016/j.jhep.2015.01.006] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 12/19/2014] [Accepted: 01/05/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND & AIMS It is well-known that the liver can induce immune tolerance, yet this knowledge could, thus far, not be translated into effective treatments for autoimmune diseases. We have previously shown that liver sinusoidal endothelial cells (LSECs) could substantially contribute to hepatic tolerance through their ability to induce CD4+ Foxp3+ regulatory T cells (Tregs). Here, we explored whether the Treg-inducing potential of LSECs could be harnessed for the treatment of autoimmune disease. METHODS We engineered a polymeric nanoparticle (NP) carrier for the selective delivery of autoantigen peptides to LSECs in vivo. In the well-characterized autoimmune disease model of experimental autoimmune encephalomyelitis (EAE), we investigated whether administration of LSEC-targeting autoantigen peptide-loaded NPs could protect mice from autoimmune disease. RESULTS We demonstrate that NP-based autoantigen delivery to LSECs could completely and permanently prevent the onset of clinical EAE. More importantly, in a therapeutic approach, mice with already established EAE improved rapidly and substantially following administration of a single dose of autoantigen peptide-loaded NPs, whereas the control group deteriorated. Treatment efficacy seemed to depend on Tregs. The Treg frequencies in the spleens of mice treated with autoantigen peptide-loaded NPs were significantly higher than those in vehicle-treated mice. Moreover, NP-mediated disease control was abrogated after Treg depletion by repeated administration of Treg-depleting antibody. CONCLUSION Our findings provide proof of principle that the selective delivery of autoantigen peptides to LSECs by NPs can induce antigen-specific Tregs and enable effective treatment of autoimmune disease. These findings highlight the importance of Treg induction by LSECs for immune tolerance.
Collapse
Affiliation(s)
- Antonella Carambia
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Barbara Freund
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dorothee Schwinge
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Oliver T Bruns
- Department of Electron Microscopy and Micro Technology, Heinrich-Pette Institute, Hamburg, Germany
| | - Sunhild C Salmen
- Institute of Physical Chemistry, University of Hamburg, Hamburg, Germany
| | - Harald Ittrich
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rudolph Reimer
- Department of Electron Microscopy and Micro Technology, Heinrich-Pette Institute, Hamburg, Germany
| | - Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Samuel Huber
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | | | - David C Wraith
- Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Thomas Korn
- Department of Neurology, TU München, München, Germany
| | - Peter Nielsen
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Horst Weller
- Institute of Physical Chemistry, University of Hamburg, Hamburg, Germany
| | - Christoph Schramm
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Lüth
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ansgar W Lohse
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Johannes Herkel
- Department of Medicine I, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| |
Collapse
|
2
|
Bargheer D, Giemsa A, Freund B, Heine M, Waurisch C, Stachowski GM, Hickey SG, Eychmüller A, Heeren J, Nielsen P. The distribution and degradation of radiolabeled superparamagnetic iron oxide nanoparticles and quantum dots in mice. Beilstein J Nanotechnol 2015; 6:111-123. [PMID: 25671156 PMCID: PMC4311637 DOI: 10.3762/bjnano.6.11] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 11/28/2014] [Indexed: 05/24/2023]
Abstract
(51)Cr-labeled, superparamagnetic, iron oxide nanoparticles ((51)Cr-SPIOs) and (65)Zn-labeled CdSe/CdS/ZnS-quantum dots ((65)Zn-Qdots) were prepared using an easy, on demand, exchange-labeling technique and their particokinetic parameters were studied in mice after intravenous injection. The results indicate that the application of these heterologous isotopes can be used to successfully mark the nanoparticles during initial distribution and organ uptake, although the (65)Zn-label appeared not to be fully stable. As the degradation of the nanoparticles takes place, the individual transport mechanisms for the different isotopes must be carefully taken into account. Although this variation in transport paths can bring new insights with regard to the respective trace element homeostasis, it can also limit the relevance of such trace material-based approaches in nanobioscience. By monitoring (51)Cr-SPIOs after oral gavage, the gastrointestinal non-absorption of intact SPIOs in a hydrophilic or lipophilic surrounding was measured in mice with such high sensitivity for the first time. After intravenous injection, polymer-coated, (65)Zn-Qdots were mainly taken up by the liver and spleen, which was different from that of ionic (65)ZnCl2. Following the label for 4 weeks, an indication of substantial degradation of the nanoparticles and the release of the label into the Zn pool was observed. Confocal microscopy of rat liver cryosections (prepared 2 h after intravenous injection of polymer-coated Qdots) revealed a colocalization with markers for Kupffer cells and liver sinusoidal endothelial cells (LSEC), but not with hepatocytes. In J774 macrophages, fluorescent Qdots were found colocalized with lysosomal markers. After 24 h, no signs of degradation could be detected. However, after 12 weeks, no fluorescent nanoparticles could be detected in the liver cryosections, which would confirm our (65)Zn data showing a substantial degradation of the polymer-coated CdSe/CdS/ZnS-Qdots in the liver.
Collapse
Affiliation(s)
- Denise Bargheer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Artur Giemsa
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Barbara Freund
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Christian Waurisch
- Institute of Physical Chemistry and Electrochemistry, Technical University of Dresden, Bergstr. 66b, 01069 Dresden, Germany
| | - Gordon M Stachowski
- Institute of Physical Chemistry and Electrochemistry, Technical University of Dresden, Bergstr. 66b, 01069 Dresden, Germany
| | - Stephen G Hickey
- Institute of Physical Chemistry and Electrochemistry, Technical University of Dresden, Bergstr. 66b, 01069 Dresden, Germany
| | - Alexander Eychmüller
- Institute of Physical Chemistry and Electrochemistry, Technical University of Dresden, Bergstr. 66b, 01069 Dresden, Germany
| | - Jörg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Peter Nielsen
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| |
Collapse
|
3
|
Stachowski GM, Bauer C, Waurisch C, Bargheer D, Nielsen P, Heeren J, Hickey SG, Eychmüller A. Synthesis of radioactively labelled CdSe/CdS/ZnS quantum dots for in vivo experiments. Beilstein J Nanotechnol 2014; 5:2383-7. [PMID: 25551066 PMCID: PMC4273238 DOI: 10.3762/bjnano.5.247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 11/17/2014] [Indexed: 06/04/2023]
Abstract
During the last decades of nanoparticles research, many nanomaterials have been developed for applications in the field of bio-labelling. For the visualization of transport processes in the body, organs and cells, luminescent quantum dots (QDs) make for highly useful diagnostic tools. However, intercellular routes, bio-distribution, metabolism during degradation or quantification of the excretion of nanoparticles, and the study of the biological response to the QDs themselves are areas which to date have not been fully investigated. In order to aid in addressing those issues, CdSe/CdS/ZnS QDs were radioactively labelled, which allows quantification of the QD concentration in the whole body or in ex vivo samples by γ-counting. However, the synthesis of radioactively labelled QDs is not trivial since the coating process must be completely adapted, and material availability, security and avoidance of radioactive waste must be considered. In this contribution, the coating of CdSe/CdS QDs with a radioactive (65)ZnS shell using a modified, operator-safe, SILAR procedure is presented. Under UV illumination, no difference in the photoluminescence of the radioactive and non-radioactive CdSe/CdS/ZnS colloidal solutions was observed. Furthermore, a down-scaled synthesis for the production of very small batches of 5 nmol QDs without loss in the fluorescence quality was developed. Subsequently, the radio-labelled QDs were phase transferred by encapsulation into an amphiphilic polymer. γ-counting of the radioactivity provided confirmation of the successful labelling and phase transfer of the QDs.
Collapse
Affiliation(s)
| | - Christoph Bauer
- Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | - Christian Waurisch
- Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
- Li-Tec Battery GmbH, Am Wiesengrund 7, 01917 Kamenz, Germany
| | - Denise Bargheer
- Department of Biochemistry and Molecular Cell Biology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Peter Nielsen
- Department of Biochemistry and Molecular Cell Biology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Jörg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Stephen G Hickey
- Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
- School of Chemistry and Forensic Science, University of Bradford, Richmond Road, Bradford BD7 1DP, United Kingdom
| | | |
Collapse
|
4
|
Carambia A, Freund B, Schwinge D, Bruns OT, Salmen SC, Ittrich H, Reimer R, Heine M, Huber S, Waurisch C, Eychmüller A, Wraith DC, Korn T, Nielsen P, Weller H, Schramm C, Lüth S, Lohse AW, Heeren J, Herkel J. Control of autoimmune neuroinflammation by nanoparticle-based myelin-antigen delivery to liver sinusoidal endothelial cells. J Neuroimmunol 2014. [DOI: 10.1016/j.jneuroim.2014.08.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
5
|
Heine M, Bartelt A, Bruns OT, Bargheer D, Giemsa A, Freund B, Scheja L, Waurisch C, Eychmüller A, Reimer R, Weller H, Nielsen P, Heeren J. The cell-type specific uptake of polymer-coated or micelle-embedded QDs and SPIOs does not provoke an acute pro-inflammatory response in the liver. Beilstein J Nanotechnol 2014; 5:1432-1440. [PMID: 25247125 PMCID: PMC4168844 DOI: 10.3762/bjnano.5.155] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 08/12/2014] [Indexed: 05/27/2023]
Abstract
Semiconductor quantum dots (QD) and superparamagnetic iron oxide nanocrystals (SPIO) have exceptional physical properties that are well suited for biomedical applications in vitro and in vivo. For future applications, the direct injection of nanocrystals for imaging and therapy represents an important entry route into the human body. Therefore, it is crucial to investigate biological responses of the body to nanocrystals to avoid harmful side effects. In recent years, we established a system to embed nanocrystals with a hydrophobic oleic acid shell either by lipid micelles or by the amphiphilic polymer poly(maleic anhydride-alt-1-octadecene) (PMAOD). The goal of the current study is to investigate the uptake processes as well as pro-inflammatory responses in the liver after the injection of these encapsulated nanocrystals. By immunofluorescence and electron microscopy studies using wild type mice, we show that 30 min after injection polymer-coated nanocrystals are primarily taken up by liver sinusoidal endothelial cells. In contrast, by using wild type, Ldlr (-/-) as well as Apoe (-/-) mice we show that nanocrystals embedded within lipid micelles are internalized by Kupffer cells and, in a process that is dependent on the LDL receptor and apolipoprotein E, by hepatocytes. Gene expression analysis of pro-inflammatory markers such as tumor necrosis factor alpha (TNFα) or chemokine (C-X-C motif) ligand 10 (Cxcl10) indicated that 48 h after injection internalized nanocrystals did not provoke pro-inflammatory pathways. In conclusion, internalized nanocrystals at least in mouse liver cells, namely endothelial cells, Kupffer cells and hepatocytes are at least not acutely associated with potential adverse side effects, underlining their potential for biomedical applications.
Collapse
Affiliation(s)
- Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| | - Alexander Bartelt
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
- Department of Genetics and Complex Disease, Harvard School of Public Health, 665 Huntington Avenue, Boston, 02115 MA, USA
| | - Oliver T Bruns
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA
| | - Denise Bargheer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| | - Artur Giemsa
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| | - Barbara Freund
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| | - Christian Waurisch
- Institute of Physical Chemistry and Electrochemistry, Technical University of Dresden, 01062 Dresden, Germany
| | - Alexander Eychmüller
- Institute of Physical Chemistry and Electrochemistry, Technical University of Dresden, 01062 Dresden, Germany
| | - Rudolph Reimer
- Department of Electron Microscopy and Micro Technology, Heinrich-Pette Institute, Martinistrasse 52, 20246 Hamburg, Germany
| | - Horst Weller
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - Peter Nielsen
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf; Martinistrasse 52, 20246 Hamburg, Germany
| |
Collapse
|
6
|
Kriegel I, Rodríguez-Fernández J, Wisnet A, Zhang H, Waurisch C, Eychmüller A, Dubavik A, Govorov AO, Feldmann J. Shedding light on vacancy-doped copper chalcogenides: shape-controlled synthesis, optical properties, and modeling of copper telluride nanocrystals with near-infrared plasmon resonances. ACS Nano 2013; 7:4367-77. [PMID: 23570329 DOI: 10.1021/nn400894d] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Size- and shape-controlled synthesis of copper chalcogenide nanocrystals (NCs) is of paramount importance for a careful engineering and understanding of their optoelectronic properties and, thus, for their exploitation in energy- and plasmonic-related applications. From the copper chalcogenide family copper telluride NCs have remained fairly unexplored as a result of a poor size-, shape-, and monodispersity control that is achieved via one-step syntheses approaches. Here we show that copper telluride (namely Cu(2-x)Te) NCs with well-defined morphologies (spheres, rods, tetrapods) can be prepared via cation exchange of preformed CdTe NCs while retaining their original shape. The resulting copper telluride NCs are characterized by pronounced plasmon bands in the near-infrared (NIR), in analogy to other copper-deficient chalcogenides (Cu(2-x)S, Cu(2-x)Se). We demonstrate that the extinction spectra of the as-prepared NCs are in agreement with theoretical calculations based on the discrete dipole approximation and an empirical dielectric function for Cu(2-x)Te. Additionally we show that the Drude model does not appropriately describe the complete set of Cu(2-x)Te NCs with different shapes. In particular, the low-intensity longitudinal plasmon bands for nanorods and tetrapods are better described by a modified Drude model with an increased damping in the long-wavelength interval. Importantly, a Lorentz model of localized quantum oscillators describes reasonably well all three morphologies, suggesting that holes in the valence band of Cu(2-x)Te cannot be described as fully free particles and that the effects of localization of holes are important. A similar behavior for Cu2-xS and Cu(2-x)Se NCs suggests that the effect of localization of holes can be a common property for the whole class of copper chalcogenide NCs. Taken altogether, our results represent a simple route toward copper telluride nanocrystals with well-defined shapes and optical properties and extend the understanding on vacancy-doped copper chalcogenide NCs with NIR optical resonances.
Collapse
Affiliation(s)
- Ilka Kriegel
- Photonics and Optoelectronics Group, Department of Physics and CeNS, Ludwig-Maximilians-Universität München, Munich, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Zakharchenko S, Puretskiy N, Stoychev G, Waurisch C, Hickey SG, Eychmüller A, Sommer JU, Ionov L. Stimuli-responsive hierarchically self-assembled 3D porous polymer-based structures with aligned pores. J Mater Chem B 2013; 1:1786-1793. [DOI: 10.1039/c2tb00231k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
8
|
Miao S, Hickey SG, Waurisch C, Lesnyak V, Otto T, Rellinghaus B, Eychmüller A. Synthesis of monodisperse cadmium phosphide nanoparticles using ex-situ produced phosphine. ACS Nano 2012; 6:7059-7065. [PMID: 22731853 DOI: 10.1021/nn3021037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The synthesis of nanoparticles using a gas-liquid interfacial reaction, which for the first time is shown to result in highly monodisperse materials across a range of sizes, is presented. We demonstrate, using cadmium phosphide as the paradigm that this synthesis method can provide colloidal nanocrystals or quantum dots monodisperse enough so that for the first time multiple transitions in their absorbance spectra can be observed. Clear evidence is given that the resulting cadmium material is Cd(6)P(7) and not Cd(3)P(2), and a thorough investigation into the role of temperature and growth time and their effects on the optical properties has been conducted. This strategy can be extended to synthesize other relevant members of the binary component pnictide semiconducting family, and the chemistry of the pnictide compound formation using this synthetic methodology has been explained using the redox potential of the metals. The suitability of the resulting cadmium phosphide quantum dots for applications in light-emitting diodes (LEDs) has further been demonstrated.
Collapse
Affiliation(s)
- Shiding Miao
- School of Chemical Engineering, Hefei University of Technology, Tunxi Road, 193, 230009, Hefei, Anhui Province, China.
| | | | | | | | | | | | | |
Collapse
|
9
|
Panda SK, Hickey SG, Waurisch C, Eychmüller A. Gradated alloyed CdZnSe nanocrystals with high luminescence quantum yields and stability for optoelectronic and biological applications. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11375e] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Bruns O, Bartelt A, Calvo M, Enrich C, Waurisch C, Eychmüller A, Reimer R, Hohenberg H, Beisiegel U, Heeren J. W16 HIGH SPEED INTRAVITAL MICROSCOPY VISUALIZES THE UPTAKE OF NANOCRYSTALS-LABELLED TRIGLYCERIDE-RICH LIPOPROTEINS IN STELLATE CELLS IN VIVO. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70017-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
Miao S, Hickey SG, Rellinghaus B, Waurisch C, Eychmüller A. Synthesis and Characterization of Cadmium Phosphide Quantum Dots Emitting in the Visible Red to Near-Infrared. J Am Chem Soc 2010; 132:5613-5. [DOI: 10.1021/ja9105732] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shiding Miao
- Physical Chemistry/Electrochemistry, TU Dresden, Bergstr. 66b, D-01062 Dresden, Germany, and IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany
| | - Stephen G. Hickey
- Physical Chemistry/Electrochemistry, TU Dresden, Bergstr. 66b, D-01062 Dresden, Germany, and IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany
| | - Bernd Rellinghaus
- Physical Chemistry/Electrochemistry, TU Dresden, Bergstr. 66b, D-01062 Dresden, Germany, and IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany
| | - Christian Waurisch
- Physical Chemistry/Electrochemistry, TU Dresden, Bergstr. 66b, D-01062 Dresden, Germany, and IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany
| | - Alexander Eychmüller
- Physical Chemistry/Electrochemistry, TU Dresden, Bergstr. 66b, D-01062 Dresden, Germany, and IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany
| |
Collapse
|
12
|
Chursanova MV, Dzhagan VM, Yukhymchuk VO, Lytvyn OS, Valakh MY, Khodasevich IA, Lehmann D, Zahn DRT, Waurisch C, Hickey SG. Nanostructured Silver Substrates With Stable and Universal SERS Properties: Application to Organic Molecules and Semiconductor Nanoparticles. Nanoscale Res Lett 2009; 5:403-9. [PMID: 20672091 PMCID: PMC2893998 DOI: 10.1007/s11671-009-9496-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Accepted: 11/16/2009] [Indexed: 05/29/2023]
Abstract
Nanostructured silver films have been prepared by thermal deposition on silicon, and their properties as SERS substrates investigated. The optimal conditions of the post-growth annealing of the substrates were established. Atomic force microscopy study revealed that the silver films with relatively dense and homogeneous arrays of 60-80-nm high pyramidal nanoislands are the most efficient for SERS of both organic dye and inorganic nanoparticles analytes. The noticeable enhancement of the Raman signal from colloidal nanoparticles with the help of silver island films is reported for the first time.
Collapse
Affiliation(s)
- MV Chursanova
- National Technical University of Ukraine “KPI”, 37 Prospect Peremohy, 03056, Kyiv, Ukraine
| | - VM Dzhagan
- V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028, Kyiv, Ukraine
| | - VO Yukhymchuk
- V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028, Kyiv, Ukraine
| | - OS Lytvyn
- V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028, Kyiv, Ukraine
| | - M Ya. Valakh
- V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028, Kyiv, Ukraine
| | - IA Khodasevich
- B.I. Stepanov Institute of Physics of National Academy of Sciences of Belarus, 220072, Minsk, Belarus
| | - D Lehmann
- Semiconductor Physics, Chemnitz University of Technology, 09107, Chemnitz, Germany
| | - DRT Zahn
- Semiconductor Physics, Chemnitz University of Technology, 09107, Chemnitz, Germany
| | - C Waurisch
- Physical Chemistry/Electrochemistry, IFW Dresden, 01171, Dresden, Germany
| | - SG Hickey
- Physical Chemistry/Electrochemistry, IFW Dresden, 01171, Dresden, Germany
| |
Collapse
|
13
|
Hickey SG, Waurisch C, Rellinghaus B, Eychmüller A. Size and Shape Control of Colloidally Synthesized IV−VI Nanoparticulate Tin(II) Sulfide. J Am Chem Soc 2008; 130:14978-80. [PMID: 18922001 DOI: 10.1021/ja8048755] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen G. Hickey
- Physical Chemistry/Electrochemistry, 01069 Dresden, IFW Dresden, P.O. Box 270116, D-01171, Dresden, Germany
| | - Christian Waurisch
- Physical Chemistry/Electrochemistry, 01069 Dresden, IFW Dresden, P.O. Box 270116, D-01171, Dresden, Germany
| | - Bernd Rellinghaus
- Physical Chemistry/Electrochemistry, 01069 Dresden, IFW Dresden, P.O. Box 270116, D-01171, Dresden, Germany
| | - Alexander Eychmüller
- Physical Chemistry/Electrochemistry, 01069 Dresden, IFW Dresden, P.O. Box 270116, D-01171, Dresden, Germany
| |
Collapse
|
14
|
Kovnir K, Schmidt M, Waurisch C, Armbrüster M, Prots Y, Grin Y. Refinement of the crystal structure of dipalladium gallium, Pd2Ga. ACTA ACUST UNITED AC 2008. [DOI: 10.1524/ncrs.2008.0004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|