scholarly journals Charge-transfer chemical reactions in nanofluidic Fabry-Pérot cavities

2021 ◽  
Vol 103 (16) ◽  
Author(s):  
L. Mauro ◽  
K. Caicedo ◽  
G. Jonusauskas ◽  
R. Avriller
Keyword(s):  
Charge Transfer ◽  
Chemical Reactions ◽  
Fabry Perot

The controllable synthesis of ultrafine one-dimensional small-molecule semiconducting nanocrystals in surfactant-assisted wet chemical reactions and their confinement effect

2017 ◽  
Vol 5 (25) ◽  
pp. 6377-6385 ◽  
Author(s):  
Jiannan Pan ◽  
Longtian Kang ◽  
Ping Huang ◽  
Ziyan Jia ◽  
Jingjing Liu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Chemical Reactions ◽  
Chemical Reaction ◽  
Small Molecule ◽  
Confinement Effect ◽  
Controllable Synthesis ◽  
One Dimensional ◽  
Wet Chemical ◽  
Transfer State ◽  
Surfactant Assisted

Ultrafine 1D nanocrystals of (FeTPP)2O have been successfully synthesized in a CTAB-assisted wet chemical reaction. The 1D confinement effect of the intermolecular charge transfer state was found.

scholarly journals Cavity Catalysis ‒Accelerating Reactions under Vibrational Strong Coupling‒

2018 ◽  
Author(s):  
Hidefumi Hiura ◽  
Atef Shalabney ◽  
Jino George
Keyword(s):  
Electromagnetic Field ◽  
Strong Coupling ◽  
Chemical Reactions ◽  
Reaction Rate ◽  
Cavity Mode ◽  
Coupling Ratio ◽  
Strong Light ◽  
Rabi Splitting ◽  
Fabry Perot ◽  
Splitting Energy

<p>In conventional catalysis the reactants interact with specific sites of the catalyst in such a way that the reaction barrier is lowered and the reaction rate is accelerated. Here we take a radically different approach to catalysis by strongly coupling the vibrations of the reactants to the vacuum electromagnetic field of a cavity. To demonstrate the possibility of such cavity catalysis, we have studied hydrolysis reactions under strong coupling of the OH stretching mode of water to a Fabry-Pérot (FP) microfluidic cavity mode. This results in an exceptionally large Rabi splitting energy ℏΩ<sub>R</sub> of 92 meV (740 cm<sup>−1</sup>), indicating the system is in vibrational ultra-strong coupling (V-USC) regime and we have found that it enhances the hydrolysis reaction rate of cyanate ions by 10<sup>2</sup> times and that of ammonia borane by 10<sup>4</sup> times. This catalytic ability is shown to depend only upon the cavity tuning and the coupling ratio. Given the vital importance of water for life and human activities, we expect our finding not only offers an unconventional way of controlling chemical reactions by ultra-strong light-matter interactions, but also changes the landscape of chemistry in a fundamental way.</p>

scholarly journals Influence of collisions on ion dynamics in the inner comae of four comets

2019 ◽  
Vol 630 ◽  
pp. A48 ◽  
Author(s):  
K. E. Mandt ◽  
A. Eriksson ◽  
A. Beth ◽  
M. Galand ◽  
E. Vigren
Keyword(s):  
Charge Transfer ◽  
Charge Exchange ◽  
Chemical Reactions ◽  
Cross Sections ◽  
Dissociative Recombination ◽  
Wind Flow ◽  
Ion Dynamics ◽  
Ion Composition ◽  
Solar Wind Flow ◽  
Inner Region

Context. Collisions between cometary neutrals in the inner coma of a comet and cometary ions that have been picked up into the solar wind flow and return to the coma lead to the formation of a broad inner boundary known as a collisionopause. This boundary is produced by a combination of charge transfer and chemical reactions, both of which are important at the location of the collisionopause boundary. Four spacecraft measured ion densities and velocities in the inner region of comets, exploring the part of the coma where an ion-neutral collisionopause boundary is expected to form. Aims. The aims are to determine the dominant physics behind the formation of the ion-neutral collisionopause and to evaluate where this boundary has been observed by spacecraft. Methods. We evaluated observations from three spacecraft at four different comets to determine if a collisionopause boundary was observed based on the reported ion velocities. We compared the measured location of the ion-neutral collisionopause with measurements of the collision cross sections to evaluate whether chemistry or charge exchange are more important at the location where the collisionopause is observed. Results. Based on measurements of the cross sections for charge transfer and for chemical reactions, the boundary observed by Rosetta appears to be the location where chemistry becomes the more probable result of a collision between H2O and H2O+ than charge exchange. Comparisons with ion observations made by Deep Space 1 at 19P/Borrelly and Giotto at 1P/Halley and 26P/Grigg-Skjellerup show that similar boundaries were observed at 19P/Borrelly and 1P/Halley. The ion composition measurements made by Giotto at Halley confirm that chemistry becomes more important inside of this boundary and that electron-ion dissociative recombination is a driver for the reported ion pileup boundary.

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