Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Density gradient ultracentrifugation for colloidal nanostructures separation and investigation

Abstract:
Density gradient ultracentrifugation (DGUC), as an effective method for the purification of nanomaterials, has attracted tremendou attentions of researchers. A recent review was reported by Science Bulletin, entitled "Density gradient ultracentrifugation for colloidal nanostructures separation and investigation" by Xiaoming Sun and Liang Luo et al from Beijing University of Chemical Technology. The authors systemtatically introduce the classification, mechanism and applications of density gradient ultracentrifugation (DGUC) with various separation examples, demonstrating the versatility of such an efficient separation technique.

Density gradient ultracentrifugation for colloidal nanostructures separation and investigation

Beijing, China | Posted on June 5th, 2018

Monodispersed nanoparticles and their assemblies have been demonstrated great application potentials due to their unique optical, electrical, magnetic and catalytic properties. During the last two decades, as the rapid development of nanomaterials, great progress of the synthetic methods of various monodispersed nanoparticles including semiconductors, metals and oxides have been made, and many assemblies based on single component or multicomponents have also been fabricated and demonstrated their unique functions. However, the synthetic repeatbility of monodispersed nanomaterials always remains a main limit of large-scale fabrications and applications. Further, rational design and synthesis of doped nanostructures with complicated components or complex structures such as core/shell structures, assymmetric structures, have become new issues in chemistry and material science, mainly due to the uncertain repeatibility. On the contrary, the separation methods for nanomaterial remain far behind. Typical methods such as membrane filtration, electrophoresis and magnetic field, also have many restraints and limited separation effect, which hinder the practical applications of nanodevices in various fields.

Aiming to solve the above issues, the DGUC technique, which was used to sort marcomolecules in biological field, has recently been demonstrated as an efficient way of sorting colloidal nanoparticles by several groups including Hersam's group and Sun's group. The DGUC can realize the separation of nanoparticles according to their differences in chemistry, structure, size and/or morphology. The authors introduced the classification, mechanism, applicability and instructions of DGUC, and demonstrated the applications including separation, purification and ultraconcentration of nanoparticles by DGUC, verifying the versatility. They further developed a new method "lab in a tube", which is helpful to monitor and get deeper insights of synthetic mechanism, in situ surface reactions and assembly processes.

###

This work was supported by the National Natural Science Foundation of China (NSFC), the National Key Research and Development Project of China (2016YFF0204402), the Program for Changjiang Scholars and Innovative Research Team in the University (IRT1205).

####

For more information, please click here

Contacts:
SUN Xiaoming

Copyright © Science China Press

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

See the article: Pengsong Li, Anuj Kumar, Jun Ma, Yun Kuang, Liang Luo, Xiaoming Sun. Density gradient ultracentrifugation for colloidal nanostructures separation and investigation. Science Bulletin, 2018, 63(10): 645-662:

Related News Press

News and information

Neutrons unlock the secrets of limoncello May 21st, 2019

Machine learning speeds modeling of experiments aimed at capturing fusion energy on Earth May 17th, 2019

Manipulating atoms one at a time with an electron beam: New method could be useful for building quantum sensors and computers May 17th, 2019

New surface treatment could improve refrigeration efficiency: A slippery surface for liquids with very low surface tension promotes droplet formation, facilitating heat transfer May 17th, 2019

Chemistry

Neutrons unlock the secrets of limoncello May 21st, 2019

Govt.-Legislation/Regulation/Funding/Policy

Machine learning speeds modeling of experiments aimed at capturing fusion energy on Earth May 17th, 2019

Manipulating atoms one at a time with an electron beam: New method could be useful for building quantum sensors and computers May 17th, 2019

New way to beat the heat in electronics: Rice University lab's flexible insulator offers high strength and superior thermal conduction May 16th, 2019

New Argonne coating could have big implications for lithium batteries May 14th, 2019

Possible Futures

Neutrons unlock the secrets of limoncello May 21st, 2019

Machine learning speeds modeling of experiments aimed at capturing fusion energy on Earth May 17th, 2019

Manipulating atoms one at a time with an electron beam: New method could be useful for building quantum sensors and computers May 17th, 2019

New surface treatment could improve refrigeration efficiency: A slippery surface for liquids with very low surface tension promotes droplet formation, facilitating heat transfer May 17th, 2019

Discoveries

Neutrons unlock the secrets of limoncello May 21st, 2019

Manipulating atoms one at a time with an electron beam: New method could be useful for building quantum sensors and computers May 17th, 2019

New surface treatment could improve refrigeration efficiency: A slippery surface for liquids with very low surface tension promotes droplet formation, facilitating heat transfer May 17th, 2019

Generating high-quality single photons for quantum computing: New dual-cavity design emits more single photons that can carry quantum information at room temperature May 17th, 2019

Materials/Metamaterials

ZEN gets $1m grant for graphene-enhanced concrete project May 12th, 2019

Computing faster with quasi-particles May 10th, 2019

Coal could yield treatment for traumatic injuries: Rice, Texas A&M, UTHealth scientists discover coal-derived ‘dots’ are effective antioxidant April 25th, 2019

Multistep self-assembly opens door to new reconfigurable materials April 19th, 2019

Announcements

Neutrons unlock the secrets of limoncello May 21st, 2019

Machine learning speeds modeling of experiments aimed at capturing fusion energy on Earth May 17th, 2019

Manipulating atoms one at a time with an electron beam: New method could be useful for building quantum sensors and computers May 17th, 2019

New surface treatment could improve refrigeration efficiency: A slippery surface for liquids with very low surface tension promotes droplet formation, facilitating heat transfer May 17th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Machine learning speeds modeling of experiments aimed at capturing fusion energy on Earth May 17th, 2019

Manipulating atoms one at a time with an electron beam: New method could be useful for building quantum sensors and computers May 17th, 2019

Generating high-quality single photons for quantum computing: New dual-cavity design emits more single photons that can carry quantum information at room temperature May 17th, 2019

New way to beat the heat in electronics: Rice University lab's flexible insulator offers high strength and superior thermal conduction May 16th, 2019

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project