High Refractive Index Carbonized Polymer Dots: Multifunctional Nano-Building Block for Optical Materials
Zhicheng Zhu1, Yutong Zhou1, Jingtong Zhai1
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 19, 2025
Summary
Sulfur-doped carbonized polymer dots (CPDs) offer a novel approach to high refractive index (RI) materials. These nanoparticles enable tunable RI in polymer nanocomposites and photonic crystal fabrication.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- High refractive index (RI) nanoparticles are essential for advanced materials.
- Conventional inorganic nanoparticles require difficult surface modifications, reducing RI.
- Doping limitations hinder the performance of traditional nanoparticles.
Purpose of the Study:
- To synthesize sulfur-doped carbonized polymer dots (Tp-CPDs) as high RI nanoparticles.
- To develop tunable RI polymer nanocomposites using Tp-CPDs.
- To explore the application of Tp-CPDs in fabricating photonic crystal structures.
Main Methods:
- Synthesis of sulfur-doped carbonized polymer dots (Tp-CPDs).
- Hybridization of Tp-CPDs with polymer matrices to form nanocomposites.
- Crosslinking of Tp-CPD assembled films.
- Surface modification of Tp-CPDs for enhanced processability.
Main Results:
- Tp-CPDs achieved a high RI of 1.7606 at 589 nm.
- Nanocomposites exhibited tunable RI from 1.5180 to 1.7606.
- Crosslinked films showed an enhanced RI of 1.7808 at 589 nm.
- Modified Tp-CPDs demonstrated good processability for nanoimprint lithography.
Conclusions:
- Sulfur-doped CPDs are effective building blocks for high RI materials.
- Tp-CPDs enable tunable RI in polymer nanocomposites and stable films.
- Tp-CPDs facilitate the fabrication of precise photonic crystal structures via nanoimprint lithography.
