scholarly journals Effect of functionalization and charging on resonance energy and radial breathing modes of metallic carbon nanotubes

2016 ◽  
Vol 93 (4) ◽  
Author(s):  
S. Öberg ◽  
J.-J. Adjizian ◽  
D. Erbahar ◽  
J. Rio ◽  
B. Humbert ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Resonance Energy ◽  
Radial Breathing Modes

Resonance Raman spectroscopy of the radial breathing modes in carbon nanotubes

2010 ◽  
Vol 42 (5) ◽  
pp. 1251-1261 ◽  
Author(s):  
P.T. Araujo ◽  
P.B.C. Pesce ◽  
M.S. Dresselhaus ◽  
K. Sato ◽  
R. Saito ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Radial Breathing Modes

scholarly journals Ultrafast Vibrational Energy Transfer from Photoexcited Carbon Nanotubes to Proteins

2019 ◽  
Vol 205 ◽  
pp. 05009
Author(s):  
Tomohito Nakayama ◽  
Shunsuke Yoshizawa ◽  
Atsushi Hirano ◽  
Takeshi Tanaka ◽  
Kentaro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Transfer ◽  
Energy Flow ◽  
Vibrational Energy ◽  
Flow System ◽  
Protein Complexes ◽  
Vibrational Energy Transfer ◽  
Relaxation Dynamics ◽  
Biomedical Systems ◽  
Radial Breathing Modes

Carbon nanotube (CNT) and protein complexes are one of the most important nanomaterials in physical and biological fields, especially for building biomedical systems based on their unique electronic and optical properties. However, there is little knowledge about ultrafast vibrational phenomena and energy flow in CNT-protein complexes. Here, we study the ultrafast vibrational energy transfer (VET) from photoexcited carbon nanotubes to adsorbed materials, such as protein and surfactant, by observing relaxation dynamics of coherent radial breathing modes (RBMs) of CNT. As a result, we found the vibrational relaxation time of the RBMs depends on phonon density of states (PDOS) of adsorbed materials. Our findings are particularly useful for designing a highly efficient phonon energy flow system from photo-excited CNT to biomaterials, and such vibrational energy transfer can be controlled by the PDOS originated from the structure of coupled biomaterials.

scholarly journals π-Conjugated polymers with pendant coumarins: design, synthesis, characterization, and interactions with carbon nanotubes

2016 ◽  
Vol 94 (9) ◽  
pp. 759-768 ◽  
Author(s):  
Mokhtar Imit ◽  
Patigul Imin ◽  
Alex Adronov
Keyword(s):  
Carbon Nanotubes ◽  
Energy Transfer ◽  
Conjugated Polymers ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Coupling Reaction ◽  
Coumarin Derivative ◽  
Design Synthesis ◽  
Quenching Efficiency ◽  
Photoluminescence Studies

A series of new fluorene-based π-conjugated polymers having coumarin derivatives as part of dendritic side chains were designed and prepared using the Suzuki–Miyaura cross-coupling reaction. A new coumarin derivative bearing a heptyl side chain for solubility was utilized to ensure solubility of the final polymers. It was found that fluorescence resonance energy transfer (FRET) from the coumrains to the polyfluorene backbone was efficient, especially for the polymers decorated with lower-generation dendrons. Each of the polymers was found to interact strongly with the surface of single-walled carbon nanotubes (SWNTs) in THF, and their ability to selectively disperse specific SWNT chiralities was investigated. Photoluminescence studies revealed that the strong polymer emission is efficiently quenched in the corresponding supramolecular complexes with SWNTs. This high quenching efficiency indicates that the coumarin–polymer FRET system can be supramolecularly bound to the surface of (SWNTs to produce an energy transfer system in which the energy absorbed by the donor coumarin chromophores is channeled to the SWNTs.

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