Nanohybrid Assemblies of Porphyrin and Au10 Cluster Nanoparticles.
Mariachiara TrapaniMaria Angela CastricianoAndrea RomeoGiovanna De LucaNelson MachadoBarry D HowesGiulietta SmulevichLuigi Monsù ScolaroPublished in: Nanomaterials (Basel, Switzerland) (2019)
The interaction between gold sub-nanometer clusters composed of ten atoms (Au10) and tetrakis(4-sulfonatophenyl)porphyrin (TPPS) was investigated through various spectroscopic techniques. Under mild acidic conditions, the formation, in aqueous solutions, of nanohybrid assemblies of porphyrin J-aggregates and Au10 cluster nanoparticles was observed. This supramolecular system tends to spontaneously cover glass substrates with a co-deposit of gold nanoclusters and porphyrin nanoaggregates, which exhibit circular dichroism (CD) spectra reflecting the enantiomorphism of histidine used as capping and reducing agent. The morphology of nanohybrid assemblies onto a glass surface was revealed by atomic force microscopy (AFM), and showed the concomitant presence of gold nanoparticles with an average size of 130 nm and porphyrin J-aggregates with lengths spanning from 100 to 1000 nm. Surface-enhanced Raman scattering (SERS) was observed for the nanohybrid assemblies.
Keyphrases
- reduced graphene oxide
- photodynamic therapy
- gold nanoparticles
- atomic force microscopy
- energy transfer
- sensitive detection
- metal organic framework
- high speed
- electron transfer
- single molecule
- quantum dots
- ionic liquid
- molecular docking
- label free
- raman spectroscopy
- molecular dynamics simulations
- density functional theory
- mass spectrometry
- molecular dynamics
- fluorescent probe