Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Radical Chain-Growth Polymerization: Overview

Radical Chain-Growth Polymerization: Overview

Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...

Radical Chain-Growth Polymerization: Mechanism

Radical Chain-Growth Polymerization: Mechanism

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...

Radical Chain-Growth Polymerization: Chain Branching

Radical Chain-Growth Polymerization: Chain Branching

The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...

Anionic Chain-Growth Polymerization: Mechanism

Anionic 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.

Cationic Chain-Growth Polymerization: Mechanism

Cationic 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,...

Understanding Memory

Understanding Memory

Memory is the retention of information or experiences over time, facilitated through three main processes: encoding, storage, and retrieval. Encoding is the process of inputting information into the memory system. For instance, when listening to a lecture, watching a play, reading a book, or having a conversation, the brain is actively encoding information. This initial stage involves transforming sensory input into a form that can be processed and stored by the brain. Various factors, such as...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Shikonin-loaded porous graphdiyne nanofilm on titanium surface for enhanced antibacterial activity and osseointegration.

Bioactive materials·2026

Same author

Salt-triggered electroactive dressing with controlled drug release for enhanced healing of exudative wounds.

Biomaterials·2025

Same author

Amyloid-like Protein-Metal Sulfide Nanocoatings for Synergistic Photothermal and Antibacterial Implant Surface Protection.

ACS nano·2025

Same author

Corrigendum to "Copper tannate nanosheets-embedded multifunctional coating for antifouling and photothermal bactericidal application" [Colloids Surf. B: Biointerfaces 245 (2025) 114208].

Colloids and surfaces. B, Biointerfaces·2025

Same author

Correction to "Biomimetic Engineering of Robust Gradient Antibacterial Coatings Using Hollow Nanoframes of Prussian Blue Analogues".

Advanced materials (Deerfield Beach, Fla.)·2025

Same author

Biomimetic Engineering of Robust Gradient Antibacterial Coatings using Hollow Nanoframes of Prussian Blue Analogues.

Advanced materials (Deerfield Beach, Fla.)·2025

Search research articles

Related Experiment Video

Updated: Jul 13, 2026

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

Synthesis and dynamic random access memory behavior of a functional polyimide.

Qi-Dan Ling¹, Feng-Chyuan Chang, Yan Song

¹Department of Chemical and Biomolecular Engineering , National University of Singapore, Kent Ridge, Singapore.

Journal of the American Chemical Society

|July 6, 2006

Summary

A new plastic dynamic random access memory (DRAM) using donor-functionalized polyimide (TP6F-PI) demonstrates stable electrical states. This memory device offers a high ON/OFF ratio and endurance for reliable data storage.

More Related Videos

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes

Published on: March 9, 2019

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

Related Experiment Videos

Last Updated: Jul 13, 2026

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes

Published on: March 9, 2019

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

Area of Science:

Materials Science
Electrical Engineering
Polymer Chemistry

Background:

Dynamic Random Access Memory (DRAM) is crucial for modern computing.
Developing stable and high-performance plastic-based memory devices is an ongoing research area.
Polyimide materials offer potential for flexible and durable electronic applications.

Purpose of the Study:

To investigate the performance of a novel plastic dynamic random access memory (DRAM) device.
To evaluate the electrical characteristics and stability of a donor-functionalized polyimide (TP6F-PI) based memory.
To assess the potential of TP6F-PI for reliable data storage applications.

Main Methods:

Fabrication of a plastic memory device utilizing donor-functionalized polyimide (TP6F-PI).
Characterization of the device's electrical properties, including write, read, erase, and refresh capabilities.
Testing of device stability under constant voltage stress and endurance through multiple read cycles.

Main Results:

The TP6F-PI based device demonstrated full memory functionality (write, read, erase, refresh).
Achieved a high ON/OFF current ratio of up to 10^5, indicating low misreading error.
Exhibited stable electrical states under 1 V voltage stress and survived over 10^8 read cycles at 1 V.

Conclusions:

The plastic dynamic random access memory based on TP6F-PI is a promising candidate for next-generation electronic memory.
The material's high ON/OFF ratio and excellent stability suggest its suitability for applications requiring high reliability.
Further research into polyimide-based memory could lead to advancements in flexible and low-cost electronic devices.