Related Experiment Video
Updated: Aug 9, 2025
17:14
Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
18.2K
Direct 3D-printed CdSe quantum dots via scanning micropipette.
Taesun Yun1, Yong Bin Kim1, Taegeon Lee1
1Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University Jeonju 54896 Republic of Korea hslee1@jbnu.ac.kr san@jbnu.ac.kr.
Nanoscale Advances
|February 17, 2023
Summary
Researchers developed a direct 3D printing method using a micropipette and cadmium selenide (CdSe) quantum dots (QDs) for micro/nanoscale patterning. This technique enables precise deposition of nanomaterial solutions for creating intricate microstructures.
Area of Science:
- Materials Science
- Nanotechnology
- Additive Manufacturing
Background:
- Micropipettes offer potential for micro/nanoscale patterning due to precise low-volume liquid handling.
- Three-dimensional (3D) printing of microstructures requires advanced deposition techniques for nanomaterials.
Purpose of the Study:
- To demonstrate a direct 3D printing technique using a micropipette for cadmium selenide (CdSe) quantum dot (QD) deposition.
- To characterize the properties of the printed CdSe QD structures.
- To explore directional control in the printing process.
Main Methods:
- Utilizing an atomic force microscope (AFM) to guide a micropipette filled with CdSe QD solution.
- Employing a direct writing approach without electric fields or piezo-pumping.
- Analyzing printed structures using photoluminescence and Raman spectroscopy.
Main Results:
- Successfully fabricated CdSe QD wires, characterized as a QD-liquid coexistence phase.
- Demonstrated the intrinsic properties of the printed CdSe QD wires via spectroscopy.
- Showcased a method for achieving directional falling during the printing process.
Conclusions:
- The micropipette-guided AFM system provides a viable method for direct 3D printing of nanomaterial structures.
- The characterized CdSe QD wires exhibit unique properties suitable for micro/nanoscale applications.
- The technique offers precise control over material deposition for advanced patterning.
