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Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

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Controlling chemistry by geometry in nanoscale systems.

L Lizana¹, Z Konkoli, B Bauer

¹Department of Physical Chemistry, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.

Annual Review of Physical Chemistry

|November 13, 2008

Summary

Chemical reactions in condensed media typically assume fixed volumes. This review explores cell biology and nanofluidic systems where changing volumes influence reaction kinetics and transport at small scales.

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Area of Science:

Physical Chemistry
Chemical Kinetics
Nanofluidics
Cell Biology

Background:

Conventional chemical reaction studies in condensed media assume static, unchanging volumes.
This assumption simplifies analysis of reaction rates, mechanisms, and thermodynamics.
However, this model does not apply to certain small-scale systems.

Purpose of the Study:

To review systems at small length scales (10 nm to 5 microm) where reaction volume is not constant.
To highlight the implications of dynamic volumes in biological and nanofluidic environments.
To discuss how shape and volume changes affect reaction kinetics and transport.

Main Methods:

Review of scientific literature focusing on chemical reactions in condensed media.
Analysis of two specific systems: cellular microenvironments and nanofluidic devices.
Examination of transport, mixing, and shape changes at thermal energy levels.

Main Results:

Cellular components (cells, organelles) and nanofluidic devices (lipid nanotube-vesicle networks) exhibit variable reaction volumes.
In these systems, transport and mixing are highly efficient, driven by diffusion.
Reaction kinetics can be actively controlled by dynamic changes in system shape and volume.

Conclusions:

Basic assumptions of constant reaction volumes are violated in cellular and nanofluidic systems.
These small-scale systems offer unique opportunities for efficient transport and controlled kinetics.
Understanding dynamic volume effects is crucial for advancing chemical reaction studies in these domains.