Related Experiment Video
Updated: Jan 23, 2026
14:42
Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
Published on: April 25, 2020
8.8K
Structural Flexibility in Activated Carbon Materials Prepared under Harsh Activation Conditions
Fabiano Gomes Ferreira de Paula1,2, Ignacio Campello-Gómez3, Paulo Fernando Ribeiro Ortega4
1Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-IUMA, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, E-03690 San Vicente del Raspeig, Spain. fabianogfp@gmail.com.
Materials (Basel, Switzerland)
|June 23, 2019
Summary
Activated carbon materials exhibit structural re-orientation upon organic molecule adsorption, altering electrical resistivity. This sensitivity enables their use in novel sensing devices.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Traditionally, high-surface area carbon materials possess rigid structures with limited electrical conductivity.
- Their properties are highly dependent on porous structure and surface chemistry.
Purpose of the Study:
- To investigate the structural and electrical properties of activated carbon materials prepared under harsh conditions.
- To explore the potential of these materials in sensing applications.
Main Methods:
- Preparation of activated carbon materials using harsh activation conditions (e.g., KOH activation).
- Adsorption of various organic molecules (hydrocarbons, alcohols).
- Measurement of structural changes and electrical resistivity.
Main Results:
- Demonstrated structural re-orientation in activated carbon materials upon adsorption of organic molecules.
- Observed significant changes in electrical resistivity correlated with molecular structure.
- Short-chain hydrocarbons increased resistivity; longer-chain hydrocarbons and alcohols decreased resistivity.
Conclusions:
- Activated carbon materials prepared under harsh conditions exhibit dynamic structural changes.
- These materials show high sensitivity to organic molecules, paving the way for sensing device applications.
Related Concept Videos
01:28Structure-Activity Relationships and Drug Design
1.7K
Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
1.7K
02:04Co-activators and Co-repressors
8.4K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
8.4K
01:26Activation Energy
86.4K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
86.4K
01:29Cholinergic Antagonists: Chemistry and Structure-Activity Relationship
2.7K
Cholinergic antagonists bind to cholinergic receptors and limit the effects of acetylcholine and other cholinergic agonists. Based on the specific cholinergic receptor affinity, these antagonists are classified as muscarinic or nicotinic. Anticholinergics interrupt parasympathetic innervations while sympathetic innervations remain uninterrupted. Muscarinic antagonists are also called 'muscarinic antagonists', 'antimuscarinics', or 'parasympatholytics'. Nicotinic...
2.7K
01:16Adrenergic Agonists: Chemistry and Structure-Activity Relationship
3.8K
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
3.8K
01:30Local Anesthetics: Chemistry and Structure-Activity Relationship
6.4K
Local anesthetics (LAs) are drugs that induce a temporary loss of sensation in a limited body area, preventing pain. Cocaine was the first local anesthetic discovered in the late 19th century. Cocaine is a benzoic acid ester obtained from the leaves of coca shrubs and was often used for its psychotropic effects. Cocaine was first isolated in 1860 by Albert Niemann. Sigmund Freud studied the physiological actions of cocaine. Carl Koller later introduced it into clinical practice in 1884 as a...
6.4K