Two-Photon Imaging of 3D Organization of Bimetallic AuAg Nanoclusters in DNA Matrix.
Katarzyna BrachMagdalena WaszkielewiczJoanna Olesiak-BanskaMarek SamocKatarzyna MatczyszynPublished in: Langmuir : the ACS journal of surfaces and colloids (2017)
We report on two-photon excitation properties of small silver-doped gold nanoclusters (AuAgNCs) and on their three-dimensional arrangement in a hybrid system composed of DNA liquid crystals (LCs) and AuAgNCs. UV-vis and fluorescence spectroscopy, transmission electron microscopy (TEM), and multiphoton excitation spectroscopy were used to characterize the nanoparticles. We show that AuAgNCs exhibit two-photon excited luminescence (2PL) emission and second-harmonic generation (SHG) and that these properties remain the same in liquid crystalline matrix. The results are described in detail and discussed in the context of possible imaging application of AuAgNC and specific AuAgNCs organization induced by liquid crystalline ordering of DNA molecules.
Keyphrases
- energy transfer
- single molecule
- living cells
- high resolution
- quantum dots
- circulating tumor
- cell free
- room temperature
- ionic liquid
- electron microscopy
- sensitive detection
- fluorescent probe
- gold nanoparticles
- solid state
- nucleic acid
- silver nanoparticles
- metal organic framework
- mass spectrometry
- monte carlo
- circulating tumor cells
- label free