Okinawa Institute of Science and Technology

The Okinawa Institute of Science and Technology is an interdisciplinary graduate school offering a 5-year PhD program in Science. Over half of the faculty and students are recruited from outside Japan, and all education and research is conducted entirely in English.

1919-1 Tancha, Onna, Kunigami District, Okinawa Prefecture 904-0495, Japan

Nanocrystallization of Amorphous Silicon Quantum Dots

managed by Okinawa Institute of Science and Technology


The crystallinity of a nanoparticle has a profound effect on its optical, electronic and chemical properties. Being able to control these properties is particularly important for advanced applications.
This technology makes it possible to control the number of metallic nanoclusters decorating a metalloid nanoparticle. The nanoclusters induce localized crystallization of the metalloid quantum dot. Further, if the metallic nanoclusters are not required for the application they can be removed without affecting the crystallinity of the quantum dot.


- Nanocluster materials can be selected from Al, Au, Ni, Pd & Cu
- Quantum dot materials can be selected from Si, Ge & SiGe
- The number of nanoclusters and therefore crystallites is controllable
- Metallic nanoclusters can be removed without affecting the crystallinity of the quantum dot


This technology is applicable to the specified materials. It may however, be possible to substitute other materials.


Materials for:
- Hydrogen storage
- Multimodal bio-imaging
- Optoelectronic devices
- Biosensors


Readiness Level (TRL)

technology validated in lab(The pie chart refers to the entire portfolio contained in the database of the helpdesk)

Technology Readiness Levels (TRL) are a method of estimating technology maturity of Critical Technology Elements (CTE) of a program during the acquisition process. The use of TRLs enables consistent, uniform, discussions of technical maturity across different types of technology.

Patent Grading Report

Patent Grading Report

The Grading Patents Report evaluates and grades US patents

Sample Buy from Wisdomain


Current status

Patent granted in multiple jurisdictions


Available for




EU-Japan Centre
European CommissionMeti