Polymer Nanotubes (polymer + nanotube)

Distribution by Scientific Domains


Selected Abstracts


Tuning and Enhancing Photoluminescence of Light-Emitting Polymer Nanotubes through Electron-Beam Irradiation

ADVANCED FUNCTIONAL MATERIALS, Issue 4 2009
Young Ki Hong
A new method for the tuning and enhancing photoluminescence (PL) characteristics of light emitting poly (3-methylthiopnehe) (P3MT) nanotubes through E-beam irradiation under atmospheric environments is reported. An E-beam generated from a linear electron accelerator (1 MeV, 1.6,,1013,8.0,,1016 electrons cm,2) is irradiated onto P3MT nanotubes including an Al2O3 template. From laser confocal microscope (LCM) PL experiments, significant enhancements in the PL intensity,up to about 90 times of an isolated single strand of the E-beam irradiated P3MT nanotubes,are observed. The luminescent color of the P3MT nanotubes changes from green to red color depending on the variation of E-beam dosage. These results might originate from the de-doping effect and the conformational modification through E-beam irradiations. Conformational changes of the E-beam irradiated P3MT nanotubes are confirmed by LCM single Raman and ultraviolet-visible (UV/Vis) absorption spectra. From UV/Vis absorption spectra, it is observed that the ,,,* transition peak and the doping induced bipolaron peaks of the P3MT nanotubes dramatically vary with E-beam irradiating conditions. [source]


Neural Electrodes: Interfacing Conducting Polymer Nanotubes with the Central Nervous System: Chronic Neural Recording using Poly(3,4-ethylenedioxythiophene) Nanotubes (Adv. Mater.

ADVANCED MATERIALS, Issue 37 2009
37/2009)
Microelectrodes implanted in the brain are increasingly being used to treat neurological disorders. However, robust and reliable chronic application of neural electrodes remains a challenge. Mohammed Reza Abidian and co-workers report on p. 3764 the use of conducting polymer nanotubes as highly selective neural interfaces for chronic neural recordings at the microscale. The quality of neuronal spike recordings was significantly improved relative to comparably sized metal electrode sites, primarily through a reduced noise level amidst maintained spike amplitudes. [source]


Interfacing Conducting Polymer Nanotubes with the Central Nervous System: Chronic Neural Recording using Poly(3,4-ethylenedioxythiophene) Nanotubes

ADVANCED MATERIALS, Issue 37 2009
Mohammad Reza Abidian
Microelectrodes implanted in the brain are increasingly being used to treat neurological disorders. However, robust and reliable chronic application of neural electrodes remains a challenge. Here, we report, the use of conducting polymer nanotubes as highly selective neural interfaces for chronic neural recordings. Poly(3,4-ethylenedioxythiophene) nanotubes were formed on the chronic neural microelectrode. The quality of neuronal spike recordings was significantly improved relative to metal electrode sites. [source]


Emission Colour Tuning in Semiconducting Polymer Nanotubes by Energy Transfer to Organo- Lanthanide Dopants,

ADVANCED MATERIALS, Issue 18 2007
S. Moynihan
Tuning of emission chromaticity in poly(N -vinylcarbazole) nanotubes by efficient energy transfer to luminescent Eu(dbm)3(Phen) organo-lanthanide chelate dopants is demonstrated. Nanotubes are synthesized by solution assisted template wetting. Under optical excitation, undoped tubes luminesce in the blue while doped tubes exhibit red europium ion emission with good color purity at the single nanotube level. [source]