Quantitative Understanding of van der Waals Interactions by Analyzing the Adsorption Structure and Low-Frequency Vibrational Modes of Single Benzene Molecules on Silver

Two isomorphous clathrates formed by dihydrocyclosporin A or cyclosporin V with tert-butyl methyl ether are reported and compared with the structures of related P21-symmetry cyclosporin clathrates. The cyclosporin molecules in both structures are associated via van der Waals interactions forming cavities occupied by solvent molecules (cyclosporin : tert-butyl methyl ether is 1 : 2).

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Low frequency vibrational modes of oxygenated myoglobin, hemoglobins, and modified derivatives.

Journal of Biological Chemistry ◽

10.1016/s0021-9258(18)47388-7 ◽

1994 ◽

Vol 269 (49) ◽

pp. 31047-31050

Author(s):

S Jeyarajah ◽

L M Proniewicz ◽

H Bronder ◽

J R Kincaid

Keyword(s):

Low Frequency ◽

Vibrational Modes

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Van der Waals interactions of the disulfide bond revealed: A microwave spectroscopic study of the diethyl disulfide–argon complex

The Journal of Chemical Physics ◽

10.1063/5.0043615 ◽

2021 ◽

Vol 154 (12) ◽

pp. 124306

Author(s):

Tao Lu ◽

Daniel A. Obenchain ◽

Jiaqi Zhang ◽

Jens-Uwe Grabow ◽

Gang Feng

Keyword(s):

Spectroscopic Study ◽

Disulfide Bond ◽

Van Der Waals ◽

Van Der Waals Interactions

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Moduli and modes in the Mikado model

Soft Matter ◽

10.1039/d1sm00551k ◽

2021 ◽

Author(s):

Brian Tighe ◽

Karsten Baumgarten

Keyword(s):

Shear Modulus ◽

Mechanical Model ◽

Low Frequency ◽

Vibrational Modes ◽

Prior Work ◽

Fiber Networks ◽

Elastic Shear Modulus ◽

Flexible Fiber ◽

Elastic Shear

We determine how low frequency vibrational modes control the elastic shear modulus of Mikado networks, a minimal mechanical model for semi-flexible fiber networks. From prior work it is known that...

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Microscopic evidence of strong interactions between chemical vapor deposited 2D MoS2 film and SiO2 growth template

Nano Convergence ◽

10.1186/s40580-021-00262-x ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Woonbae Sohn ◽

Ki Chang Kwon ◽

Jun Min Suh ◽

Tae Hyung Lee ◽

Kwang Chul Roh ◽

...

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Spherical Aberration ◽

Van Der Waals ◽

Chemical Vapor ◽

Interface Layer ◽

Van Der Waals Interactions ◽

Strong Interactions ◽

Transition Electron Microscopy ◽

Oxide Substrates

AbstractTwo-dimensional MoS2 film can grow on oxide substrates including Al2O3 and SiO2. However, it cannot grow usually on non-oxide substrates such as a bare Si wafer using chemical vapor deposition. To address this issue, we prepared as-synthesized and transferred MoS2 (AS-MoS2 and TR-MoS2) films on SiO2/Si substrates and studied the effect of the SiO2 layer on the atomic and electronic structure of the MoS2 films using spherical aberration-corrected scanning transition electron microscopy (STEM) and electron energy loss spectroscopy (EELS). The interlayer distance between MoS2 layers film showed a change at the AS-MoS2/SiO2 interface, which is attributed to the formation of S–O chemical bonding at the interface, whereas the TR-MoS2/SiO2 interface showed only van der Waals interactions. Through STEM and EELS studies, we confirmed that there exists a bonding state in addition to the van der Waals force, which is the dominant interaction between MoS2 and SiO2. The formation of S–O bonding at the AS-MoS2/SiO2 interface layer suggests that the sulfur atoms at the termination layer in the MoS2 films are bonded to the oxygen atoms of the SiO2 layer during chemical vapor deposition. Our results indicate that the S–O bonding feature promotes the growth of MoS2 thin films on oxide growth templates.

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Carrier-capture-assisted optoelectronics based on van der Waals materials to imitate medicine-acting metaplasticity

npj 2D Materials and Applications ◽

10.1038/s41699-021-00241-0 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

Qianfan Nie ◽

Caifang Gao ◽

Feng-Shou Yang ◽

Ko-Chun Lee ◽

Che-Yi Lin ◽

...

Keyword(s):

Weight Change ◽

Synaptic Weight ◽

Van Der Waals ◽

Low Frequency ◽

Photonic Devices ◽

Frequency Noise ◽

Carrier Capture ◽

Electronic Engineering ◽

Neural Simulation ◽

Van Der Waals Materials

AbstractRecently, researchers have focused on optoelectronics based on two-dimensional van der Waals materials to realize multifunctional memory and neuron applications. Layered indium selenide (InSe) semiconductors satisfy various requirements as photosensitive channel materials, and enable the realization of intriguing optoelectronic applications. Herein, we demonstrate InSe photonic devices with different trends of output currents rooted in the carrier capture/release events under various gate voltages. Furthermore, we reported an increasing/flattening/decreasing synaptic weight change index (∆Wn) via a modulated gate electric field, which we use to imitate medicine-acting metaplasticity with effective/stable/ineffective features analogous to the synaptic weight change in the nervous system of the human brain. Finally, we take advantage of the low-frequency noise (LFN) measurements and the energy-band explanation to verify the rationality of carrier capture-assisted optoelectronics applied to neural simulation at the device level. Utilizing optoelectronics to simulate essential biomedical neurobehaviors, we experimentally demonstrate the feasibility and meaningfulness of combining electronic engineering with biomedical neurology.

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Concisely modularized assembling of graphene-based thin films with promising electrode performance

Materials Chemistry Frontiers ◽

10.1039/c8qm00628h ◽

2019 ◽

Vol 3 (7) ◽

pp. 1462-1470 ◽

Cited By ~ 2

Author(s):

Weiwei Wei ◽

Rohit L. Vekariy ◽

Chuanting You ◽

Yafei He ◽

Ping Liu ◽

...

Keyword(s):

Thin Films ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Double Layer ◽

Van Der Waals ◽

Cellulose Nanofibers ◽

Van Der Waals Interactions ◽

Electrode Performance ◽

Reduced Graphene

Highly dense thin films assembled from cellulose nanofibers and reduced graphene oxide via van der Waals interactions to realize ultrahigh volumetric double-layer capacitances.

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