ATP-Responsive Nanoparticles Covered with Biomolecular Machine "Chaperonin GroEL".

Herein, we report an ATP-responsive nanoparticle ( NP) whose surface is fully covered with the biomolecular machine "chaperonin protein GroEL". NP was synthesized by DNA hybridization between a gold NP with DNA strands on its surface and GroEL carrying complementary DNA strands at its apical domains. The unique structure of NP was visualized by transmission electron microscopy including under cryogenic conditions.

Towards understanding of poly-guanine activated fluorescent silver nanoclusters.

It has been recently reported that the fluorescence of some DNA-templated silver nanoclusters (AgNCs) can be significantly enhanced upon by hybridizing with a partially complementary DNA containing a G-rich overhang near the AgNCs. This discovery has found a number of analytical applications but many fundamental questions remain to be answered. In this work, the photostability of these activated AgNCs is reported.

DNA stabilized silver nanoclusters for ratiometric and visual detection of Hg²⁺ and its immobilization in hydrogels.

DNA oligomers are particularly interesting templates for making silver nanoclusters (AgNCs) as different emission colors can be obtained by varying the DNA sequence. Many AgNCs have been used as Hg²⁺ sensors since Hg²⁺ induces fluorescence quenching. From an analytical chemistry standpoint, however, these 'light off' sensors are undesirable.

Correlation of photobleaching, oxidation and metal induced fluorescence quenching of DNA-templated silver nanoclusters.

Few-atom noble metal nanoclusters have attracted a lot of interest due to their potential applications in biosensor development, imaging and catalysis. DNA-templated silver nanoclusters (AgNCs) are of particular interest as different emission colors can be obtained by changing the DNA sequence. A popular analytical application is fluorescence quenching by Hg(2+), where d(10)-d(10) metallophilic interaction has often been proposed for associating Hg(2+) with nanoclusters.