Tubular Hybrids: A Nanoparticle-Molecular Network.
Priyadarshi RanjanSreejith ShankarRonit Popovitz-BiroSidney R CohenIddo PinkasReshef TenneMichal LahavMilko E van der BoomPublished in: Langmuir : the ACS journal of surfaces and colloids (2018)
We report here a new methodology for the formation of freestanding nanotubes composed of individual gold nanoparticles (NPs) cross-linked by coordination complexes or porphyrin molecules using WS2 nanotubes (INT-WS2) as a template. Our method consists of three steps: (i) coverage of these robust inorganic materials with monodispersed and dense monolayers of gold NPs, (ii) formation of a molecular AuNP network by exposing these decorated tubes to solutions containing a ruthenium polypyridyl complex or meso-tetra(4-pyridyl)porphyrin, and (iii) removal of the INT-WS2 template with a hydrogen peroxide solution. Nanoindentation of the template-free AuNP tubes with atomic force microscopy indicates a radial elastic modulus of 4 GPa. The template-free molecular AuNP tubes are characterized using scanning and transmission electron microscopy, energy-dispersive X-ray spectroscopy, and micro-Raman spectroscopy. The methodology provides a convenient and scalable strategy for the realization of molecular AuNP tubes with a defined length and diameter, depending on the dimensions of the template.
Keyphrases
- electron microscopy
- hydrogen peroxide
- single molecule
- atomic force microscopy
- molecularly imprinted
- gold nanoparticles
- raman spectroscopy
- high resolution
- photodynamic therapy
- nitric oxide
- magnetic resonance
- solid phase extraction
- high speed
- mass spectrometry
- endothelial cells
- computed tomography
- ultrasound guided
- gas chromatography
- gas chromatography mass spectrometry
- tandem mass spectrometry
- optical coherence tomography
- affordable care act