Nanodiamonds

Nanodiamonds

Diamond particles having an average size of 4 ~ 5nm are generated by detonating mixed explosives in sealed conditions. Our detonation pilot facility began operations in 2014.
Moreover,through the chemical purification and the disintegration treatment of the crude product obtained by detonation, we have succeeded in developing a water dispersion of single-digit nanodiamonds. Daicel is now developing various applications, taking advantage of these unique characteristics.

Nanodiamonds are produced from detonation with an average primary particle size of 4-5 nm

TEM Image / Nanodiamonds
  • ・Surface Treatment, Chemical Modification
  • ・High dispersibility
  • ・High functionality

Detonation Nanodiamonds

A Diamond structure is formed from carbon atoms in explosions at very high temperature and pressure generated by detonation of a mixture of TNT and RDX in a closed chamber.

Detonation Nanodiamonds

Detonation Nanodiamonds

Characteristics and Applications

Nanodiamonds are expected to be used in various fields of application by taking advantage of diamond properties and controlling surface chemistry of nanoparticles which have a large surface area.

  • High hardness
  • Small particle size
  • Stable dispersion
  • Stable dispersion
  • Stable dispersion
  • Stable dispersion
  • High refractive index
  • Isotropic diffusion of light
  • Good thermal conductivity
  • High thermal conductivity
  • High thermal conductivity
  • High thermal conductivity
High thermal conductivity
Composite with resins/metals
Optical materials
High performance films, Hard coat
Heat dissipating materials
High Thermal conductivity polymer composite
Medical & Health-care
Lower toxicity, better biological affinity
Composite Plating
Less metal usage, Thinner & more uniform film,High deposition rate, Sliding properties …
Lubricant
Reduce friction, reduce fuel usage …

Single Digit Nanodiamond (SDND)

Nanodiamonds are originally obtained as an aggregate. It is expected that diamond properties will be more prominently expressed when the aggregates are further disintegrated into primary particles. Daicel is developing the single digit nanodiamond (SDND).

Control of surface Chemistry

Chemical reactions such as functional group transformation or substituent introduction can be applied on oxygen functional groups or sp2 carbon atoms on the surface of Nanodiamonds. This can improve the dispersibility into various media, and add new functions and properties.

Purified Nanodiamonds

Purified Nanodiamonds

Oxydation

Oxydation
(Carboxylic acids)

Increase hydrophilicity,
controlling surface electrical charge

Reduction

Reduction
(Hydroxylation)

Increase hydrophilicity,
Introducing chemical substituents

Reduction

Reduction
(Hydrogenation)/ Alkylation

Increasing hydrophobicity,
controlling surface electrical charge

Polymerizable

Polymerizable /
Reactive substituent

Functionalize, Network

Heteroatom

Heteroatom
( N、S、Halogen … )

Functional substituent

Functional substituent
( eg. Silanized reagents )

Development of Nanodiamonds at DAICEL

Daicel is making efforts forwards integrated production of SDND from detonation synthesis of nanodiamonds and development of nanodiamond products designed for various applications.

We are intending to expand into new business fields by combining the technologies that we, Daicel Group, have accumulated.

Contact
Daicel Corporation
R&D Headquarters Market Development
TEL. +81 (0)3-6711-3542