151
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Chevalier J, Tillement O, Ayela F. Structure and rheology of SiO2 nanoparticle suspensions under very high shear rates. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 80:051403. [PMID: 20364981 DOI: 10.1103/physreve.80.051403] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 09/16/2009] [Indexed: 05/29/2023]
Abstract
High shear rate experiments have been performed with capillary microviscometers onto SiO2 nanoparticles dispersed in alcohol (so-called nanofluids). The aim of these experiments was to investigate the processes of aggregation and dislocation of the nanoparticles in a shear flow under perikinetic and orthokinetic conditions. Shear rates as high as 2x10(5) s-1 were obtained in pressure-driven microchannels laminar flows. All the nanofluids under test have displayed a Newtonian behavior but with a strong enhanced viscosity, that is, the consequence of an effective volume concentration higher than the real one. It was possible to determine the average size of the aggregates and to find a correlation between their structure and the range of the hydrodynamic Peclet number at which experiments were performed. These results display a strong evidence of the role of aggregates and support the recent conclusions about the controversy of the thermal properties of nanofluids.
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Affiliation(s)
- J Chevalier
- Institut Néel, CNRS, 25 Avenue des Martyrs, BP 166, 38042 Grenoble Cedex 9, France
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152
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Faure AC, Dufort S, Josserand V, Perriat P, Coll JL, Roux S, Tillement O. Control of the in vivo biodistribution of hybrid nanoparticles with different poly(ethylene glycol) coatings. Small 2009; 5:2565-75. [PMID: 19768700 DOI: 10.1002/smll.200900563] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Fluorescent nanoparticles containing a gadolinium oxide core are very attractive because they are able to combine both imaging (fluorescence imaging, magnetic resonance imaging) and therapy (X-ray therapy and neutron-capture therapy) techniques. The exploitation of these multifunctional particles for in vivo applications requires accurate control of their biodistribution. The postfunctionalization of these particles by four different poly(ethylene glycol) derivatives, which differ by chain length and end group, exerts a great influence on the zeta potential of the nanoparticles and on their biodistribution after intravenous injection to HEK-beta3-tumor-bearing mice. This study reveals that the behavior of PEGylated nanoparticles, which was monitored by in vivo fluorescence imaging, depends on both the chain length and the end group of the PEG chain.
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Affiliation(s)
- Anne-Charlotte Faure
- Laboratoire de Physico-Chimie des Matériaux Luminescents, CNRS UMR 5620, Université Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, France
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153
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Fizet J, Rivière C, Bridot JL, Charvet N, Louis C, Billotey C, Raccurt M, Morel G, Roux S, Perriat P, Tillement O. Multi-luminescent hybrid gadolinium oxide nanoparticles as potential cell labeling. J Nanosci Nanotechnol 2009; 9:5717-5725. [PMID: 19908443 DOI: 10.1166/jnn.2009.1237] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This manuscript analyses the use of newly developed hybrid gadolinium oxide nanoparticles as cell-labeling tracers. The nanoparticles are core-shell particles composed of a core of gadolinium oxide of [2-4] nm and a protecting shell of polysiloxane [1-3 nm] where different organic dyes (fluoresceine isothiocyanate (FITC) or rhodamine B isothiocyanate (RBITC)) are embedded. They are functionalized with poly(ethylene glycol)bis(carboxymethyl) to ensure their colloidal stability in biological buffers. These particles are potential multi-labeling tracers (magnetic and optical). In this paper, we show by optical imaging that they can be efficiently internalized in cells without cell alteration. The in-vitro uptake of the nanoparticles was followed in two cell lines (human fibroblasts and a human adenocarnima cell lines MCF7 cells). Nanoparticles distribution within cells was analysed by confocal analysis, and gadolinium concentration within cells was quantified by mass spectrometry (ICP-MS analysis). Nanoparticles uptake is found to be fast and efficient for both cell lines, with fluorescent labeling visible after 10 min of incubation whatever the nature of the fluorophore. The fluorescent intensity is mainly found as concentrated dots in the perinuclear region of the cells and decreases with the number of days in culture, but is still easily detectable after 3 days in culture. No significant effect on cell growth was detected. Finally, we show in this study the protective effect of the polysiloxane layer: encapsulation of RBITC within the polysiloxane shell, leads to a better photostability of this low cost dye than Cy3 and even reach a level comparable to Alexa 595. With their high photostability and long-lasting contrast properties, these hybrid luminescent nanoparticles appears thus as a versatile solution to assess multiple cell fate both in in-vitro cell model as well as in-vivo.
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Affiliation(s)
- J Fizet
- Université de Lyon, Lyon F-69003, France
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154
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Illy S, Tillement O, Machizaud F, Dubois JM, Massicot F, Fort Y, Ghanbaja J. First direct evidence of size-dependent structural transition in nanosized nickel particles. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/01418619908210344] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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155
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Sancey L, Dufort S, Josserand V, Keramidas M, Righini C, Rome C, Faure AC, Foillard S, Roux S, Boturyn D, Tillement O, Koenig A, Boutet J, Rizo P, Dumy P, Coll JL. Drug development in oncology assisted by noninvasive optical imaging. Int J Pharm 2009; 379:309-16. [PMID: 19467306 DOI: 10.1016/j.ijpharm.2009.05.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 04/27/2009] [Accepted: 05/18/2009] [Indexed: 01/09/2023]
Abstract
Early and accurate detection of tumors, like the development of targeted treatments, is a major field of research in oncology. The generation of specific vectors, capable of transporting a drug or a contrast agent to the primary tumor site as well as to the remote (micro-) metastasis would be an asset for early diagnosis and cancer therapy. Our goal was to develop new treatments based on the use of tumor-targeted delivery of large biomolecules (DNA, siRNA, peptides, or nanoparticles), able to induce apoptosis while dodging the specific mechanisms developed by tumor cells to resist this programmed cell death. Nonetheless, the insufficient effectiveness of the vectorization systems is still a crucial issue. In this context, we generated new targeting vectors for drug and biomolecules delivery and developed several optical imaging systems for the follow-up and evaluation of these vectorization systems in live mice. Based on our recent work, we present a brief overview of how noninvasive optical imaging in small animals can accelerate the development of targeted therapeutics in oncology.
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Affiliation(s)
- L Sancey
- CRI-INSERM U823, Cibles diagnostiques ou thérapeutiques et vectorisation de drogues dans les cellules tumorales, Institut Albert Bonniot, BP 170, 38 042 Grenoble cedex 9, France
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156
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Ou M, Mutelet B, Martini M, Bazzi R, Roux S, Ledoux G, Tillement O, Perriat P. Optimization of the synthesis of nanostructured Tb3+-doped Gd2O3 by in-situ luminescence following up. J Colloid Interface Sci 2009; 333:684-9. [DOI: 10.1016/j.jcis.2009.01.062] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2008] [Revised: 10/07/2008] [Accepted: 01/20/2009] [Indexed: 11/26/2022]
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157
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Bridot JL, Dayde D, Rivière C, Mandon C, Billotey C, Lerondel S, Sabattier R, Cartron G, Le Pape A, Blondiaux G, Janier M, Perriat P, Roux S, Tillement O. Hybrid gadolinium oxide nanoparticles combining imaging and therapy. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b815836c] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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158
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Faure AC, Barbillon G, Ou M, Ledoux G, Tillement O, Roux S, Fabregue D, Descamps A, Bijeon JL, Marquette CA, Billotey C, Jamois C, Benyatou T, Perriat P. Core/shell nanoparticles for multiple biological detection with enhanced sensitivity and kinetics. Nanotechnology 2008; 19:485103. [PMID: 21836293 DOI: 10.1088/0957-4484/19/48/485103] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The paper shows the different methods to attach a molecule to detect streptavidin to a dielectric particle made of a rare-earth oxide core and a polysiloxane shell containing fluorescein. First, the detection of streptavidin binding on a biotinylated gold substrate can be achieved in three ways: the shift of the surface plasmon resonance of the substrate and the double luminescence (organic and inorganic) of the core/shell particle. Second, these detections are efficient even after elimination upon thermal annealing of all the undesired molecules that skew the assays. Finally, the particle that ballasts the protein enhances its binding kinetics and increases the localized surface plasmon resonance shift that detects the binding.
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Affiliation(s)
- Anne-Charlotte Faure
- Université de Lyon, Université Lyon 1, CNRS UMR 5620, Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML), F-69622 Villeurbanne Cedex, France
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159
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Faure AC, Hoffmann C, Bazzi R, Goubard F, Pauthe E, Marquette CA, Blum LJ, Perriat P, Roux S, Tillement O. Functionalization of luminescent aminated particles for facile bioconjugation. ACS Nano 2008; 2:2273-2282. [PMID: 19206393 DOI: 10.1021/nn8004476] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
For labeling proteins (streptavidin and fibronectin) by luminescent aminated nanoparticles, an interesting strategy that requires neither activation nor chemical pre- or post-treatment was explored. Because biomolecules are easily rendered luminescent after reaction with organic dyes carrying isothiocyanate moiety, phenylene diisothiocyanate (DITC) was used for covalently binding proteins onto luminescent hybrid gadolinium oxide nanoparticles whose ability to combine imaging and therapy was recently demonstrated.
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Affiliation(s)
- Anne-Charlotte Faure
- Laboratoire de Physico-Chimie des Materiaux Luminescents, UMR 5620 CNRS-Universite Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, France
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160
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Dufort S, Faure AC, Roux S, Tillement O, Foillard S, Boturyn D, Dumy P, Goutayer M, Texier I, Rizo P, Josserand V, Coll JL. Utilisation de l’imagerie optique pour l’étude de la biodistribution des nanoparticules. Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)75021-6] [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: 10/21/2022]
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161
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Ou M, Lu G, Shen H, Descamps A, Marquette CA, Blum LJ, Roux S, Tillement O, Cheng B, Perriat P. Influence of pH upon Surface-enhanced Enzyme-catalyzed Luminol Chemiluminescence at Vicinity of Nanoscale-corrugated Gold and Silver Films. Photochem Photobiol 2008; 84:1244-8. [DOI: 10.1111/j.1751-1097.2008.00350.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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162
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Alric C, Taleb J, Le Duc G, Mandon C, Billotey C, Le Meur-Herland A, Brochard T, Vocanson F, Janier M, Perriat P, Roux S, Tillement O. Gadolinium chelate coated gold nanoparticles as contrast agents for both X-ray computed tomography and magnetic resonance imaging. J Am Chem Soc 2008; 130:5908-15. [PMID: 18407638 DOI: 10.1021/ja078176p] [Citation(s) in RCA: 352] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Functionalized gold nanoparticles were applied as contrast agents for both in vivo X-ray and magnetic resonance imaging. These particles were obtained by encapsulating gold cores within a multilayered organic shell which is composed of gadolinium chelates bound to each other through disulfide bonds. The contrast enhancement in MRI stems from the presence of gadolinium ions which are entrapped in the organic shell, whereas the gold core provides a strong X-ray absorption. This study revealed that these particles suited for dual modality imaging freely circulate in the blood vessels without undesirable accumulation in the lungs, spleen, and liver.
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Affiliation(s)
- Christophe Alric
- Laboratoire de Physico-Chimie des Matériaux Luminescents, UMR 5620 CNRS-Université Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, France
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163
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Barbillon G, Faure AC, El Kork N, Moretti P, Roux S, Tillement O, Ou MG, Descamps A, Perriat P, Vial A, Bijeon JL, Marquette CA, Jacquier B. How nanoparticles encapsulating fluorophores allow a double detection of biomolecules by localized surface plasmon resonance and luminescence. Nanotechnology 2008; 19:035705. [PMID: 21817590 DOI: 10.1088/0957-4484/19/03/035705] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The paper shows how polysiloxane particles encapsulating fluorophores can be successfully used to detect biotin-streptavidin binding by two types of technique. After functionalization of the particles by streptavidin, the fixation of the biomolecule can indeed be detected by a shift of the localized surface plasmon resonance of the biotinylated gold dots used as substrate and by the luminescence of the fluorophores evidenced by scanning near-field optical microscopy. The development of particles allowing such a double detection opens a route for increasing the reliability of biological detection and for multi-labelling strategies crossing both detection principles.
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Affiliation(s)
- G Barbillon
- Université de Lyon, Université Lyon 1, CNRS UMR 5620, Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML), Domaine Scientifique de La Doua, Bât Kastler, 10 rue André Marie Ampère 69622 Villeurbanne Cédex, France. Institut Charles Delaunay, CNRS FRE 2848, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Université de Technologie de Troyes, 12 rue Marie Curie BP 2060 10010 Troyes Cédex, France
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164
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Bridot JL, Dayde D, Faure AC, Laurent S, Rivière C, Billotey C, Hiba B, Janier M, Josserand V, Coll JL, Vander Elst L, Muller R, Sabattier R, Lerondel S, Lepape A, Perriat P, Roux S, Tillement O. CMR 2007: 7.07: Hybrid gadolinium oxide nanoparticles: contrast agents combining diagnosis and therapy. Contrast Media Mol Imaging 2008. [DOI: 10.1002/cmmi.192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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165
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Le Duc G, Regnard P, Serduc R, Roux S, Bräuer-Krisch E, Tillement O, Bravin A. CMR 2007: 3.05: Use of a Gd-chelate as a dose enhancement agent for synchrotron microbeam radiation therapy applied to rodent brain tumors. Contrast Media Mol Imaging 2007. [DOI: 10.1002/cmmi.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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166
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Roux S, Alric C, Taleb J, Mandon C, Billotey C, Brochard T, Le Duc G, Debouttière PJ, Vocanson F, Janier M, Perriat P, Tillement O. CMR 2007: 8.03: Gold nanoparticles as contrast agents for MRI and X-ray computed tomography imaging. Contrast Media Mol Imaging 2007. [DOI: 10.1002/cmmi.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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167
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Shen H, Lu G, Ou M, Marquette CA, Ledoux G, Roux S, Tillement O, Perriat P, Cheng B, Chen Z. How the morphology of biochips roughness increases surface-enhanced chemiluminescence. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.03.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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168
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Bridot JL, Faure AC, Laurent S, Rivière C, Billotey C, Hiba B, Janier M, Josserand V, Coll JL, Elst LV, Muller R, Roux S, Perriat P, Tillement O. Hybrid Gadolinium Oxide Nanoparticles: Multimodal Contrast Agents for in Vivo Imaging. J Am Chem Soc 2007; 129:5076-84. [PMID: 17397154 DOI: 10.1021/ja068356j] [Citation(s) in RCA: 471] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Luminescent hybrid nanoparticles with a paramagnetic Gd2O3 core were applied as contrast agents for both in vivo fluorescence and magnetic resonance imaging. These hybrid particles were obtained by encapsulating Gd2O3 cores within a polysiloxane shell which carries organic fluorophores and carboxylated PEG covalently tethered to the inorganic network. Longitudinal proton relaxivities of these particles are higher than the positive contrast agents like Gd-DOTA which are commonly used for clinical magnetic resonance imaging. Moreover these particles can be followed up by fluorescence imaging. This study revealed that these particles suited for dual modality imaging freely circulate in the blood vessels without undesirable accumulation in lungs and liver.
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Affiliation(s)
- Jean-Luc Bridot
- Laboratoire de Physico-Chimie des Matériaux Luminescents, UMR 5620 CNRS-Université Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, France
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169
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Didierjean J, Castaing M, Balembois F, Georges P, Perrodin D, Fourmigué JM, Lebbou K, Brenier A, Tillement O. High-power laser with Nd:YAG single-crystal fiber grown by the micro-pulling-down technique. Opt Lett 2006; 31:3468-70. [PMID: 17099752 DOI: 10.1364/ol.31.003468] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We present optical characterization and laser results achieved with single-crystal fibers directly grown by the micro-pulling-down technique. We investigate the spectroscopic and optical quality of the fiber, and we present the first laser results. We achieved a cw laser power of 10 W at 1064 nm for an incident pump power of 60 W at 808 nm and 360 kW peak power for 12 ns pulses at 1 kHz in the Q-switched regime. It is, to the best of our knowledge, the highest laser power ever achieved with directly grown single-crystal fibers.
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Affiliation(s)
- Julien Didierjean
- Laboratoire Charles Fabry de l'Institut d'Optique, Centre Universitaire d'Orsay, Orsay, France.
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170
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Chani V, Lebbou K, Hautefeuille B, Tillement O, Fourmigue JM. Evaporation induced diameter control in fiber crystal growth by micro-pulling-down technique: Bi4Ge3O12. Cryst Res Technol 2006. [DOI: 10.1002/crat.200610707] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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171
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Louis C, Roux S, Ledoux G, Dujardin C, Tillement O, Cheng BL, Perriat P. Luminescence enhancement by energy transfer in core-shell structures. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.06.085] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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172
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Bridot JL, Louis C, Roux S, Marquette C, Billotey C, Beuf O, Perriat P, Tillement O. CMR 2005: 13.02: Doubly luminescent gadolinium oxide nanoparticles as contrast agents for MRI. Contrast Media Mol Imaging 2006. [DOI: 10.1002/cmmi.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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173
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Lebbou K, Perriat P, Tillement O. Recent progress on elaboration of undoped and doped Y2O3, Gd2O3 rare-earth nano-oxide. J Nanosci Nanotechnol 2005; 5:1448-54. [PMID: 16193957 DOI: 10.1166/jnn.2005.312] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Some selected materials with small sizes in the nanometer region are reviewed. Different methods for synthesis of nanoscale materials are classified and discussed. Basic prerequisites for successful use of the materials for nanotechnology application are their synthesis with specific and homogeneous composition and geometry. This review summarizes recent results on nanoscale materials containing optically active lanthanide ion especially focused on Y2O3 and Gd2O3 oxide.
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Affiliation(s)
- K Lebbou
- Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon 1 University, CNRS UMR 5620, Bat A Kastler, 10 rue Ampere, 69622 Villeurbanne Cedex, France
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174
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Roux S, Garcia B, Bridot JL, Salomé M, Marquette C, Lemelle L, Gillet P, Blum L, Perriat P, Tillement O. Synthesis, characterization of dihydrolipoic acid capped gold nanoparticles, and functionalization by the electroluminescent luminol. Langmuir 2005; 21:2526-2536. [PMID: 15752049 DOI: 10.1021/la048082i] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The use of gold nanoparticles as biological probes requires the improvement of colloidal stability. Dihydrolipoic acid (DHLA), a dithiol obtained by the reduction of thioctic acid, appears therefore very attractive for the stabilization and the further functionalization of gold nanoparticles because DHLA is characterized by a carboxylic acid group and two thiol functions. The ionizable carboxylic acid groups ensure, for pH > or = 8, the water solubility of DHLA-capped gold (Au@DHLA) nanoparticles, prepared by the Brust protocol, and the stability of the resulting colloid by electrostatic repulsions. Moreover almost all DHLA, adsorbed onto gold, adopts a conformation allowing their immobilization by both sulfur ends. It is proved by sulfur K-edge X-ray absorption near edge structure spectroscopy, which appears as an appropriate tool for determining the chemical form of sulfur atoms present in the organic monolayer. Such a grafting renders the DHLA monolayers more resistant to displacement by dithiothreitol than mercaptoundecanoic acid monolayers. The presence of DHLA on gold particles allows their functionalization by the electroluminescent luminol through amine coupling reactions assisted by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide. As a luminol-functionalized particle is nine times as bright as a single luminol molecule, the use of the particles as a biological probe with a lower threshold of detection is envisaged.
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Affiliation(s)
- Stéphane Roux
- Laboratoire de Physico-Chimie des Matériaux Luminescents, UMR CNRS 5620, Université Claude Bernard Lyon 1, Domaine Scientifique de la Doua, 69622 Villeurbanne Cedex, France.
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175
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Garcia B, Salome M, Lemelle L, Bridot JL, Gillet P, Perriat P, Roux S, Tillement O. Sulfur K-edge XANES study of dihydrolipoic acid capped gold nanoparticles: dihydrolipoic acid is bound by both sulfur ends. Chem Commun (Camb) 2005:369-71. [PMID: 15645040 DOI: 10.1039/b411231h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dihydrolipoic acid (DHLA) capped gold nanoparticles (Au@DHLA) are characterized in solid and liquid states by sulfur K-edge XANES spectroscopy; it clearly shows that DHLA is anchored to gold thanks to both sulfur ends.
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Affiliation(s)
- Bruno Garcia
- Laboratoire de Physico-Chimie des Matériaux Luminescents, UMR CNRS 5620, Université Claude Bernard Lyon 1, Domaine Scientifique de la Doua, 69622 Villeurbanne Cedex, France
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176
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Ledoux G, Mercier B, Louis C, Dujardin C, Tillement O, Perriat P. Synthesis and optical characterization of Gd2O3:Eu3+ nanocrystals: surface states and VUV excitation. RADIAT MEAS 2004. [DOI: 10.1016/j.radmeas.2004.03.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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177
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Bazzi R, Flores MA, Louis C, Lebbou K, Zhang W, Dujardin C, Roux S, Mercier B, Ledoux G, Bernstein E, Perriat P, Tillement O. Synthesis and properties of europium-based phosphors on the nanometer scale: Eu2O3, Gd2O3:Eu, and Y2O3:Eu. J Colloid Interface Sci 2004; 273:191-7. [PMID: 15051451 DOI: 10.1016/j.jcis.2003.10.031] [Citation(s) in RCA: 175] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2003] [Accepted: 10/22/2003] [Indexed: 11/17/2022]
Abstract
Nanocrystals of oxides containing europium as the main constituent or as a doping element in RE2O3 ( RE=Y, Gd) have been prepared by direct oxide precipitation in high-boiling polyalcohol solutions and characterized by high-resolution TEM, absorption spectroscopy, and luminescence spectroscopy. The samples obtained consisted of concentrated and colloidally stable suspensions of luminescent oxide nanoparticles with an average grain diameter in the range 2-5 nm. The nanoparticles were found to be highly crystalline despite their ultrasmall size and the low temperature of 180 degrees C applied during the synthesis. Upon UV excitation, the red luminescence relative to the 5D0-->7Fn transition within the cubic form of RE2O3 exhibits some important differences from that usually found in bulk materials.
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Affiliation(s)
- R Bazzi
- LPCML, Université Lyon 1, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
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178
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Chabane Sari SM, Debouttière PJ, Lamartine R, Vocanson F, Dujardin C, Ledoux G, Roux S, Tillement O, Perriat P. Grafting of colloidal stable gold nanoparticles with lissamine rhodamine B: an original procedure for counting the number of dye molecules attached to the particles. ACTA ACUST UNITED AC 2004. [DOI: 10.1039/b311497j] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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179
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Tillement O, Illy-cherrey S, Dubois JM, Begin-colin S, Massicot F, Schneider R, Fort Y, Ghanbaja J, Bellouard C, Belin-ferre E. Synthesis and properties of nearly single-shell nickel clusters in amorphous aluminium oxides. ACTA ACUST UNITED AC 2002. [DOI: 10.1080/01418610208240009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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180
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Gaffet E, Bernard F, Niepce JC, Charlot F, Gras C, Le Caër G, Guichard JL, Delcroix P, Mocellin A, Tillement O. Some recent developments in mechanical activation and mechanosynthesis. ACTA ACUST UNITED AC 1999. [DOI: 10.1039/a804645j] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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