Growth Mechanism

A growth mechanism describes the chemical and physical processes by which a material, molecule, or structure increases in size, making it essential for understanding how composition, conditions, and reaction pathways shape products. In chemistry, growth commonly involves nucleation followed by the addition, diffusion, and organization of atoms, ions, or molecules at an evolving surface, with rates influenced by concentration, temperature, solvent, and reaction kinetics. Studying these mechanisms helps researchers control crystal size, particle morphology, thin-film formation, and other material properties. This knowledge supports applications in catalysis, pharmaceuticals, nanomaterials, and advanced manufacturing.

Growth Mechanism - Related Videos

Education

JoVE Core - Organic Chemistry

Radical Chain-Growth Polymerization: Mechanism

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2023

The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into the...

Anionic Chain-Growth Polymerization: Mechanism

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2023

The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.

Cationic Chain-Growth Polymerization: Mechanism

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2023

The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...

Research

JoVE Journal - Medicine

A Rat Tibial Growth Plate Injury Model to Characterize Repair Mechanisms and Evaluate Growth Plate Regeneration Strategies

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Cited by 22 •

2017

The growth plate is a cartilaginous region in children's long bones where longitudinal growth occurs. When injured, bony tissue can form and impair growth. We describe a rat model of growth plate injury that leads to bony repair tissue, allowing the study of repair mechanisms and growth plate regeneration strategies.

Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism

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Cited by 2 •

2018

We report a solution-based method to synthesize substrate-bound Au nanowires. By tuning the molecular ligands used during the synthesis, the Au nanowires can be grown from various substrates with different surface properties. Au nanowire-based nanostructures can also be synthesized by adjusting the reaction parameters.

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