Gold nanoparticle source

Single-molecule gold-nanoparticle tracking.

Gold nanoparticles, like single fluorophores, can be used to locate single molecules with nanometer accuracy. Unlike an optical trap, the gold particle label does not exert an external load, which is important for studying diffusive processes. Thus, a gold particle can be used analogously to a single fluorophore, providing similar information but with submillisecond time resolution. The feature...

Gold Nanoparticle-Biological Molecule Interactions

This review gives a brief summary of the field of gold nanoparticle interactions with biological molecules, particularly those with possible catalytic relevance. Gold nanoparticles are well known as catalysts in organic chemistry but much is unknown regarding their potential as catalysts of reactions involving biological molecules such as protein and nucleic acids. Biological molecules may be t...

Design of an Ytterbium-169 Brachytherapy Source for Gold Nanoparticle-aided Radiation Therapy

1/f noise in gold nanoparticle chemosensors

We present a systematic study of low-frequency noise in Au nanoparticle chemosensors. All the sensors we have studied exhibit 1 / f-type noise at low frequencies. The magnitude of the 1/ f noise was smaller in devices with a larger device area, indicating that the 1/ f noise is caused by intrinsic processes. The noise amplitude was found to be strongly temperature dependent between 40–300 K, wi...

Phase Transition of DNA-Linked Gold Nanoparticle

Melting and hybridization of DNA-capped gold nanoparticle networks are investigated with optical absorption spectroscopy. Single-stranded, 12-base DNA-capped gold nanoparticles are linked with complementary, single-stranded, 24-base linker DNA to form particle networks. Compared to free DNA, a sharp melting transition is seen in these networked DNA-nanoparticle systems. The sharpness is explain...