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Related Concept Videos

Weak Base Solutions03:21

Weak Base Solutions

25.3K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
25.3K
Weak Acid Solutions04:02

Weak Acid Solutions

43.3K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
43.3K
Titration of a Weak Acid with a Weak Base01:08

Titration of a Weak Acid with a Weak Base

5.0K
Weak acids and bases do not undergo dissociation completely, and titrations between these two are rarely studied. When such studies are performed, say, for the titration of a weak acid with a weak base, the titration curve plots the change in pH as a function of the volume of base added. Take the titration of acetic acid with ammonia, for instance. During the titration, these two species form ammonium acetate and water, but the pH change is slow and gradual.
As a result, there is no simple...
5.0K
Titration Calculations: Weak Acid - Strong Base03:55

Titration Calculations: Weak Acid - Strong Base

49.3K
Calculating pH for Titration Solutions: Weak Acid/Strong Base
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:
49.3K
Assembly of the Lipid Bilayer in the ER01:28

Assembly of the Lipid Bilayer in the ER

4.3K
Biological membranes are more than just a barrier separating cell cytoplasm from the outside environment. They are highly dynamic and help maintain the integrity and physiological stability of the cells as well as membrane-bound organelles. Membranes also play vital roles in cell-to-cell and intracellular communication.
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
4.3K
Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

9.9K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
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Updated: Feb 9, 2026

Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
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Weak localization in bilayer graphene with Li-intercalation/desorption.

Y Endo1, S Ichinokura1, R Akiyama1

  • 1Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|June 15, 2018
PubMed
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Lithium intercalation in bilayer graphene alters its electrical properties. Desorbing lithium changes resistivity and magnetoconductance, indicating modified carrier transport and stacking structures.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid State Chemistry

Background:

  • Bilayer graphene exhibits unique electronic properties influenced by substrate and intercalation.
  • Understanding carrier transport mechanisms is crucial for advanced electronic applications.

Purpose of the Study:

  • To investigate the effects of Li intercalation and subsequent desorption on the electrical transport properties of bilayer graphene.
  • To analyze the changes in magnetoconductance and carrier scattering mechanisms.

Main Methods:

  • In-situ electrical transport measurements on SiC-grown bilayer graphene.
  • Li-intercalation and Li-desorption processes.
  • Analysis of magnetoconductance using the extended Hikami-Larkin-Nagaoka equation.

Main Results:

  • Li-desorbed bilayer graphene showed higher resistivity and altered magnetoconductance compared to pristine graphene.
  • Weak localization of carriers was observed at low temperatures in all samples.
  • Pristine graphene followed the AB stacking model, dominated by electron-electron scattering.
  • Li-desorbed graphene exhibited magnetoconductance inconsistent with simple AB or AA stacking, suggesting domain coexistence.

Conclusions:

  • Lithium intercalation significantly modifies the electronic structure and transport properties of bilayer graphene.
  • The stacking structure of bilayer graphene is complex and can be altered by intercalation/desorption processes.
  • Electron-electron scattering and substrate dopants play key roles in carrier transport in pristine bilayer graphene.