7 research outputs found
Helical Polycarbodiimide Cloaking of Carbon Nanotubes Enables Inter-Nanotube Exciton Energy Transfer Modulation
The
use of single-walled carbon nanotubes (SWCNTs) as near-infrared
optical probes and sensors require the ability to simultaneously modulate
nanotube fluorescence and functionally derivatize the nanotube surface
using noncovalent methods. We synthesized a small library of polycarbodiimides
to noncovalently encapsulate SWCNTs with a diverse set of functional
coatings, enabling their suspension in aqueous solution. These polymers,
known to adopt helical conformations, exhibited ordered surface coverage
on the nanotubes and allowed systematic modulation of nanotube optical
properties, producing up to 12-fold differences in photoluminescence
efficiency. Polymer cloaking of the fluorescent nanotubes facilitated
the first instance of controllable and reversible internanotube exciton
energy transfer, allowing kinetic measurements of dynamic self-assembly
and disassembly
Helical Polycarbodiimide Cloaking of Carbon Nanotubes Enables Inter-Nanotube Exciton Energy Transfer Modulation
The
use of single-walled carbon nanotubes (SWCNTs) as near-infrared
optical probes and sensors require the ability to simultaneously modulate
nanotube fluorescence and functionally derivatize the nanotube surface
using noncovalent methods. We synthesized a small library of polycarbodiimides
to noncovalently encapsulate SWCNTs with a diverse set of functional
coatings, enabling their suspension in aqueous solution. These polymers,
known to adopt helical conformations, exhibited ordered surface coverage
on the nanotubes and allowed systematic modulation of nanotube optical
properties, producing up to 12-fold differences in photoluminescence
efficiency. Polymer cloaking of the fluorescent nanotubes facilitated
the first instance of controllable and reversible internanotube exciton
energy transfer, allowing kinetic measurements of dynamic self-assembly
and disassembly
G-Quadruplex DNA Bound by a Synthetic Ligand is Highly Dynamic
G-Quadruplex DNA Bound by a Synthetic Ligand is Highly Dynami