Multiphoton absorption mechanism of TMTTF, its radical cation and soluble single wall carbon nanotubes
نویسندگان
چکیده
Non linear absorption is a non linear optical property which can be observed with large photon intensities and corresponds to instantaneous or sequential absorption of more than one photon. Highly polarisable molecules show high non linear optical activity and in the following it will be presented the multiphoton absorption properties of tetramethyltetratiafulvalene (TMTTF), its radical cation and pristine and soluble single wall carbon nanotubes (SWNT). One finds that excited two photon absorptions are active for nanosecond laser pulses at 532 nm with very large absorption cross sections.
منابع مشابه
A novel label-free cocaine assay based on aptamer-wrapped single-walled carbon nanotubes
Objective(s): This paper describes a selective and sensitive biosensor based on the dissolution and aggregation of aptamer wrapped single-walled carbon nanotubes. We report on the direct detection of aptamer–cocaine interactions, namely between a DNA aptamer and cocaine molecules based on near-infrared absorption at λ807. Materials and Methods: First a DNA aptamer recognizing cocaine was non-co...
متن کاملEffects of Structure and Partially Localization of the π Electron Clouds of Single-Walled Carbon Nanotubes on the Cation-π Interactions
A C102H30 graphene sheet has been rolled up to construct Single-Walled Carbon NanoTube Fragments (SWCNTFs) as parts of armchair carbon nanotubes by computational quantum chemistry methods. Non-covalent cation-π interactions of the Na+ cation on the central rings of SWCNTFs have investigated. The binding energies of the Na+-SWCNTF complexes versus ...
متن کاملJa n 20 05 Combination of carbon nanotubes and two - photon absorbers for broadband optical limiting
New systems are required for optical limiting against broadband laser pulses. We demonstrate that the association of non-linear scattering from single-wall carbon nanotubes (SWNT) and multiphoton absorption (MPA) from organic chromophores is a promising approach to extend performances of optical limiters over broad spectral and temporal ranges. Such composites display high linear transmission a...
متن کاملCombination of carbon nanotubes and two-photon absorbers for broadband optical limiting
New systems are required for optical limiting against broadband laser pulses. We demonstrate that the association of non-linear scattering from single-wall carbon nanotubes (SWNT) and multiphoton absorption (MPA) from organic chromophores is a promising approach to extend performances of optical limiters over broad spectral and temporal ranges. Such composites display high linear transmission a...
متن کاملMeasurement of Benzene in Air by Iranian Single-Wall Carbon Nanotubes
Background: Nanotechnology is a new approach that has been lionized in recent years. One of its applications is its consumption as an absorbent. In this study, the single-wall carbon nanotubes (SWCNTs) were used as an absorbent for sampling benzene in the air. Materials and Methods: For this study, SWCNTs manufactured by Iran and SKC’s activated charcoal were used for sampling benzene vapors....
متن کامل