Growth and stability of Pt on Au nanorods

He, Daiping; Han, Yi; Fennell, John F.; Horswell, Sarah L.; Li, Ziyou

doi:10.1063/1.4751288

Cited by 16 publications

(29 citation statements)

References 21 publications

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“…19 In contrast, NRs prepared with the selective blocking method retained their original size and shape. Hence, the blocking method produces Au–Pt core–shell NRs that exhibit greater long-term stability than NRs obtained by standard chemical deposition.…”

Section: Resultsmentioning

confidence: 99%

A Selective Blocking Method To Control the Overgrowth of Pt on Au Nanorods

Fennell

Tanyi

et al. 2013

J. Am. Chem. Soc.

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A method for the preparation of smooth deposits of Pt on Au nanorods is described, involving sequential deposition steps with selective blocking of surface sites that reduces Pt-on-Pt deposition. The Au–Pt nanorods prepared by this method have higher long-term stability than those prepared by standard Pt deposition. Electrochemical data show that the resulting structure has more extended regions of Pt surface and enhanced activity toward the carbon monoxide oxidation and oxygen reduction reactions.

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Section: Resultsmentioning

confidence: 99%

A Selective Blocking Method To Control the Overgrowth of Pt on Au Nanorods

Fennell

Tanyi

et al. 2013

J. Am. Chem. Soc.

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“…As a result of this, AuPt can be said to bridge the miscible AuPd system and the more immiscible AuRh system. Our own study and the work of others conducted on AuPt nanorods indicates a tendency for clustered growth of Pt, with a marked preference for Pt growth on the nanorod end facets [83,91]; examples from our work are shown in Fig. 9.…”

Section: Synthetic Manipulation Of Pt On Au Nanorod Growthmentioning

confidence: 78%

“…Similar morphology changes were observed for AuPt NRs with different amounts of Pt coating. This process can be accelerated by annealing AuPt nanorods at 200 C [83]. It is possible that the mechanism of the Reproduced from [83].…”

Section: Synthetic Manipulation Of Pt On Au Nanorod Growthmentioning

confidence: 96%

“…This process can be accelerated by annealing AuPt nanorods at 200 C [83]. It is possible that the mechanism of the Reproduced from [83]. Copyright 2012 American Institute of Physics change in morphology is a result of initial Pt clustering growth that leaves part of the Au surface uncovered especially in the middle of the Au nanorod.…”

Section: Synthetic Manipulation Of Pt On Au Nanorod Growthmentioning

confidence: 97%

“…However, the driving force responsible for the interfacial structure of any given system cannot easily be determined by simply considering these parameters in isolation, so we have used computer simulations to assist with the analysis and interpretation of the experimental results. In addition to the AuPd and AuRh systems mentioned above, we have also considered the related AuPt system, for which structural and chemical studies have recently been carried out [82,83].…”

Section: Characterisation Of Interfacial Structures Of Aurh and Aupd mentioning

confidence: 99%

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Interfacial Structures and Bonding in Metal-Coated Gold Nanorods

Chantry

Atanasov

Horswell

et al. 2014

Structure and Bonding

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We present a topical review of research in the field of metal-coated gold nanorods. By combining synthetic design strategies with state-of-the art characterisation techniques (particularly aberration-corrected scanning transmission electron microscopy) and molecular dynamic simulations, we demonstrate the potential to gain a fundamental understanding of, and control over, the atomic detail of metalmetal bonding at the interfaces of core-shell nanorods and nanoparticles. This analysis is facilitated by making comparisons between the related bimetallic systems: AuRh, AuPd and AuPt.

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Anisotropic Plasmonic Metal Heterostructures as Theranostic Nanosystems for Near Infrared Light‐Activated Fluorescence Amplification and Phototherapy

Chang

Cheng

et al. 2019

Advanced Science

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The development of sophisticated theranostic systems for simultaneous near infrared (NIR) fluorescence imaging and phototherapy is of particular interest. Herein, anisotropic plasmonic metal heterostructures, Pt end‐deposited Au nanorods (PEA NRs), are developed to efficiently produce hot electrons under 808 nm laser irradiation, exhibiting the strong electric density. These hot electrons can release the heat through electron‐phonon relaxation and form reactive oxygen species through chemical transformation, as a result of potent photothermal and photodynamic performance. Simultaneously, the confined electromagnetic field of PEA NRs can transfer energy to adjacent polyethylene glycol (PEG)‐linked NIR fluorophores (CF) based on their energy overlap mechanism, leading to remarkable NIR fluorescence amplification in CF‐PEA NRs. Various PEG linkers (1, 3.4, 5.0, and 10 kD) are employed to regulate the distance between CF and PEA NRs of CF‐PEA NRs, and the maximum fluorescence intensity is achieved in CF 5k ‐PEA NRs. After further attachment with i‐motif DNA/Nrf2 siRNA chimera to simultaneously suppress both cellular antioxidant defense and hyperthermia resistance effects, the final biocompatible CF 5k ‐ b PEA@siRNA NRs present promising NIR fluorescence imaging ability and 808 nm laser‐activated photothermal and photodynamic therapeutic effect in MCF7 cells and tumor‐bearing mice, holding great potential for cancer therapy.

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Growth and stability of Pt on Au nanorods

Cited by 16 publications

References 21 publications

A Selective Blocking Method To Control the Overgrowth of Pt on Au Nanorods

A Selective Blocking Method To Control the Overgrowth of Pt on Au Nanorods

Interfacial Structures and Bonding in Metal-Coated Gold Nanorods

Anisotropic Plasmonic Metal Heterostructures as Theranostic Nanosystems for Near Infrared Light‐Activated Fluorescence Amplification and Phototherapy

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