Relaxation dynamics via acoustic phonons in carbon nanotubes

2012 ◽  
Vol 249 (12) ◽  
pp. 2483-2486 ◽  
Author(s):  
Christopher Köhler ◽  
Tobias Watermann ◽  
Ermin Malic
Keyword(s):  
Carbon Nanotubes ◽  
Relaxation Dynamics ◽  
Acoustic Phonons

Ultrafast Relaxation Dynamics via Acoustic Phonons in Carbon Nanotubes

Nano Letters ◽  
2012 ◽  
Vol 12 (5) ◽  
pp. 2249-2253 ◽  
Author(s):  
Olga A. Dyatlova ◽  
Christopher Köhler ◽  
Ermin Malic ◽  
Jordi Gomis-Bresco ◽  
Janina Maultzsch ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Relaxation Dynamics ◽  
Acoustic Phonons ◽  
Ultrafast Relaxation

scholarly journals Peierls Transition with Acoustic Phonons and Solitwistons in Carbon Nanotubes

2001 ◽  
Vol 86 (20) ◽  
pp. 4572-4575 ◽  
Author(s):  
Marc Thilo Figge ◽  
Maxim Mostovoy ◽  
Jasper Knoester
Keyword(s):  
Carbon Nanotubes ◽  
Acoustic Phonons ◽  
Peierls Transition

scholarly journals Calculated Terahertz Spectra of Glycine Oligopeptide Solutions Confined in Carbon Nanotubes

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 385 ◽  
Author(s):  
Dongxiong Ling ◽  
Mingkun Zhang ◽  
Jianxun Song ◽  
Dongshan Wei
Keyword(s):  
Carbon Nanotubes ◽  
Signal To Noise Ratio ◽  
Thz Spectroscopy ◽  
Water Molecules ◽  
Relaxation Dynamics ◽  
Confinement Effects ◽  
Nanofluidic Channels ◽  
Detection Of Biomolecules ◽  
Thz Absorption ◽  
Dynamics Simulations

To reduce the intense terahertz (THz) wave absorption of water and increase the signal-to-noise ratio, the THz spectroscopy detection of biomolecules usually operates using the nanofluidic channel technologies in practice. The effects of confinement due to the existence of nanofluidic channels on the conformation and dynamics of biomolecules are well known. However, studies of confinement effects on the THz spectra of biomolecules are still not clear. In this work, extensive all-atom molecular dynamics simulations are performed to investigate the THz spectra of the glycine oligopeptide solutions in free and confined environments. THz spectra of the oligopeptide solutions confined in carbon nanotubes (CNTs) with different radii are calculated and compared. Results indicate that with the increase of the degree of confinement (the reverse of the radius of CNT), the THz absorption coefficient decreases monotonically. By analyzing the diffusion coefficient and dielectric relaxation dynamics, the hydrogen bond life, and the vibration density of the state of the water molecules in free solution and in CNTs, we conclude that the confinement effects on the THz spectra of biomolecule solutions are mainly to slow down the dynamics of water molecules and hence to reduce the THz absorption of the whole solution in confined environments.

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.

Diameter-dependent relaxation dynamics of 1D excitons in single-walled carbon nanotubes

2008 ◽  
Vol 128 (5-6) ◽  
pp. 952-955 ◽  
Author(s):  
Masao Ichida ◽  
Satoshi Sakoda ◽  
Yumie Kiyohara ◽  
Singo Saito ◽  
Yasumitsu Miyata ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Relaxation Dynamics ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Environmental influence on linear optical spectra and relaxation dynamics in carbon nanotubes

2009 ◽  
Vol 246 (11-12) ◽  
pp. 2592-2597 ◽  
Author(s):  
Ermin Malić ◽  
Matthias Hirtschulz ◽  
Janina Maultzsch ◽  
Stephanie Reich ◽  
Andreas Knorr
Keyword(s):  
Carbon Nanotubes ◽  
Environmental Influence ◽  
Optical Spectra ◽  
Relaxation Dynamics ◽  
Linear Optical
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