Gold and silver nanoparticles surface functionalized with rhenium carbonyl complexes

Pérez-Mirabet, Leonardo; Surinyach, Santiago; Ros, Josep; Suades, Joan; Yáñez, Ramón

doi:10.1016/j.matchemphys.2012.08.068

Cited by 8 publications

(8 citation statements)

References 66 publications

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“…The photoelectron peaks assignable to the maghemite part of the composite were at 711.0 and 724.2 eV (Fe2p 3/2 and Fe2p 1/2 ) and 530.2 eV (O1s) [ 24 , 28 ]. The spectra also contained several gold photoelectron peaks, namely Au4p 3/2 (353.8 eV), Au4p 5/2 (333.4 eV), Au4f 5/2 (87.0 eV) and Au4f 7/2 (83.8 eV) [ 29 , 30 , 31 ]. Similar data were also reported for the gold nanoparticles [ 32 ] or gold seeds on the surface of the magnetite nanoparticles [ 27 ], which were covalently layered with the herein used lipoic acid.…”

Section: Resultsmentioning

confidence: 99%

Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics

Štarha

Smola

Trávníček

2015

IJMS

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The preparation and thorough characterization of a hybrid magnetic carrier system for the possible transport of activated platinum-based anticancer drugs, as demonstrated for cisplatin (cis-[Pt(NH3)2Cl2], CDDP), are described. The final functionalized mag/Au–LA–CDDP* system consists of maghemite/gold nanoparticles (mag/Au) coated by lipoic acid (HLA; LA stands for deprotonated form of lipoic acid) and functionalized by activated cisplatin in the form of cis-[Pt(NH3)2(H2O)2]2+ (CDDP*). The relevant techniques (XPS, EDS, ICP-MS) proved the incorporation of the platinum-containing species on the surface of the studied hybrid system. HRTEM, TEM and SEM images showed the nanoparticles as spherical with an average size of 12 nm, while their superparamagnetic feature was proven by 57Fe Mössbauer spectroscopy. In the case of mag/Au, mag/Au–HLA and mag/Au–LA–CDDP*, weaker magnetic interactions among the Fe3+ centers of maghemite, as compared to maghemite nanoparticles (mag), were detected, which can be associated with the non-covalent coating of the maghemite surface by gold. The pH and time-dependent stability of the mag/Au–LA–CDDP* system in different media, represented by acetate (pH 5.0), phosphate (pH 7.0) and carbonate (pH 9.0) buffers and connected with the release of the platinum-containing species, showed the ability of CDDP* to be released from the functionalized nanosystem.

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Section: Resultsmentioning

confidence: 99%

Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics

Štarha

Smola

Trávníček

2015

IJMS

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“…The absorption bands in the range 500–400 cm −1 are attributed to Ag. Our results are consistent with previously reported results . Therefore, Ag nanoparticles were successfully functionalized with MPA.…”

Section: Resultsmentioning

confidence: 99%

“…Our results are consistent with previously reported results. 30 Therefore, Ag nanoparticles were successfully functionalized with MPA. Figure 8 shows the optical absorption of N719 dye, TiO 2 , and MPA-Ag nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Plasmonic Effects of Infiltrated Silver Nanoparticles Inside TiO₂ Film: Enhanced Photovoltaic Performance in DSSCs

Garmaroudi

Mohammadi

2015

J. Am. Ceram. Soc.

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The plasmonic effects of infiltrated silver (Ag) nanoparticles, with different contents, inside a nanostructured TiO2 film on the photovoltaic performance of dye‐sensitized solar cells (DSSCs) are explored. The synthesized Ag nanoparticles are immobilized onto deposited TiO2 nanoparticles by a new strategy using 3‐mercaptopropionic acid (MPA), a bifunctional linker molecule. Transmission electron microscope (TEM) images show that monodispersed Ag and polydispersed TiO2 nanoparticles have an average diameter of 12 ± 3 nm and 5 ± 1 nm, respectively. Moreover, Fourier transform infrared spectroscopy (FTIR) analysis reveals that Ag nanoparticles were successfully functionalized and capped with MPA. Optical studies on the MPA‐capped Ag nanoparticles inside TiO2 film show an increase in the total absorbance of the electrode. Moreover, EIS measurements confirm that MPA‐capped Ag nanoparticles inhibit the charge recombination and improve the stability of nanoparticles in I3−/I− electrolyte. The DSSC assembled with optimal content of MPA‐capped Ag nanoparticles demonstrated an enhanced power conversion efficiency (8.82% ± 0.07%) compared with the pure TiO2 (7.30% ± 0.05%). The increase in cell efficiency was attributed to the enhanced dye light absorption in strength and spectral range due to the surface plasmon resonance of MPA‐capped Ag nanoparticles in the photoanode.

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“…33, Scheme 1B) have been linked to the shell of AuNPs under CuAAC conditions, 134 but this procedure necessitates strong goldligand attachment; aggregation of the AuNPs has been observed when CuAAC is employed at ligands attached to AuNPs through weak anchoring groups such as carboxylate. 135 Coordination chemistry on the shell of the hybrid is also relatively unexplored compared to the methods described in Sections 3.1, 3.2 and 3.3.1: among limited examples, rhenium(I) carbonyl species have been successfully coordinated to the carboxylated periphery of AuNPs, 136 and the chloro ligand of RuHCl(CO)(PPh 3 ) 3 has been displaced by pendant thiol groups at triazine-coated AuNPs. 96…”

Section: Direct Covalentmentioning

confidence: 99%

Transition metal complex/gold nanoparticle hybrid materials

2020

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Gold and silver nanoparticles surface functionalized with rhenium carbonyl complexes

Cited by 8 publications

References 66 publications

Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics

Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics

Plasmonic Effects of Infiltrated Silver Nanoparticles Inside TiO₂ Film: Enhanced Photovoltaic Performance in DSSCs

Transition metal complex/gold nanoparticle hybrid materials

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Gold and silver nanoparticles surface functionalized with rhenium carbonyl complexes

Cited by 8 publications

References 66 publications

Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics

Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics

Plasmonic Effects of Infiltrated Silver Nanoparticles Inside TiO2 Film: Enhanced Photovoltaic Performance in DSSCs

Transition metal complex/gold nanoparticle hybrid materials

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Plasmonic Effects of Infiltrated Silver Nanoparticles Inside TiO₂ Film: Enhanced Photovoltaic Performance in DSSCs