Related Experiment Video
Updated: Jun 14, 2026
08:49
Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
Published on: December 4, 2014
14.7K
VN Thin Films via MOCVD Using a New Vanadium Precursor: Linking Growth Chemistry to Functional Surface Properties
Jean-Pierre Glauber1,2, Julian Lorenz3, Ji Liu4
1Institute for Materials Chemistry, Leibniz Institute for Solid State and Materials Research Dresden, 01069, Dresden, Germany.
Small Methods
|December 19, 2025
Summary
A new metalorganic chemical vapor deposition (MOCVD) method creates high-quality vanadium nitride (VN) thin films. This advancement is crucial for developing efficient catalysts for the electrochemical nitrogen reduction reaction (eNRR).
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Vanadium nitride (VN) shows promise for electrochemical nitrogen reduction reaction (eNRR) applications.
- Current synthesis methods for VN catalysts lack precise control, hindering structure-property relationship studies.
Purpose of the Study:
- To develop a controlled synthesis method for high-quality VN thin films.
- To investigate the structure-property relationships of VN for eNRR applications.
Main Methods:
- Metalorganic chemical vapor deposition (MOCVD) using N,N'-diisopropylformamidinatovanadate [V(dpfamd)3] precursor and NH3 co-reactant.
- Characterization techniques: XRD, RBS/NRA, XPS, SEM, TEM.
- First principles density functional theory (DFT) simulations.
Main Results:
- Successfully synthesized pure, crystalline, faceted VN thin films on Si and Ti substrates.
- NH3 was found to be crucial for favorable precursor decomposition and VN formation.
- Preliminary eNRR tests suggest a correlation between film faceting and catalytic activity.
Conclusions:
- The developed MOCVD process offers precise control over VN thin film synthesis.
- MOCVD-grown VN thin films are promising candidates for future eNRR catalyst development.
Related Concept Videos
01:20Anionic Chain-Growth Polymerization: Overview
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
01:04Anionic Chain-Growth Polymerization: Mechanism
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.
00:57Cationic Chain-Growth Polymerization: Mechanism
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,...
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...