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Updated: May 26, 2025

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
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Ga多层模型:捕捉GaN(0001) 从子单层增长到多层模式的特征

Razia1, Madhav Ranganathan1

  • 1Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India. madhavr@iitk.ac.in.

Physical chemistry chemical physics : PCCP
|February 24, 2025
PubMed
概括

化 (GaN) 薄膜生长在富含的条件下更为平滑,这是由于的作用.

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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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...
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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...
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