The research paper reveals the potential to further expand the extensive family of nanostructured materials. Images: From Science 2017, 358, 514-518. Reprinted with permission from AAAS.
Non–Close-Packed Nanoparticle Arrays: Porous Materials with Novel Crystal Structures Assembled from Nanoparticles
18th January 2018
(a) Illustration of the different interaction mechanisms of the proteins, salt, and interface. (b) Sketch of protein adsorption on the attractive surface by increasing cs=cp. Copyright: Authors, reprinted with permission from DOI: 10.1103/PhysRevLett.119.228001.
Multivalent Ion-Activated Protein Adsorption Reflecting Bulk Reentrant Behavior
8th February 2018
A team of researchers from CIC biomaGUNE, Universidad Politécnica de Madrid / Technical University of Madrid and Universidad Complutense de Madrid / Complutense University of Madrid have shown that it is possible to use special lasers to shape gold nanoparticles to enhance their properties to a degree of optical quality never seen previously. Science. 2017; 358, 640-644. Copyright: Authors.

A team of researchers from CIC biomaGUNE, Universidad Politécnica de Madrid / Technical University of Madrid and Universidad Complutense de Madrid / Complutense University of Madrid have shown that it is possible to use special lasers to shape gold nanoparticles to enhance their properties to a degree of optical quality never seen previously. Science. 2017; 358, 640-644. Image: Andrés Guerrero

 

The irradiation of gold nanorod colloids with a femtosecond laser can be tuned to induce controlled nanorod reshaping, yielding colloids with exceptionally narrow localized surface plasmon resonance bands. The process relies on a regime characterized by a gentle multishot reduction of the aspect ratio, whereas the rod shape and volume are barely affected. Successful reshaping can only occur within a narrow window of the heat dissipation rate: Low cooling rates lead to drastic morphological changes, and fast cooling has nearly no effect. Hence, a delicate balance must be achieved between irradiation fluence and surface density of the surfactant on the nanorods. This perfection process is appealing because it provides a simple, fast, reproducible, and scalable route toward gold nanorods with an optical response of exceptional quality, near the theoretical limit.

Read more:
González-Rubio G. et al.,

Science. 2017; 358, 640-644.

Press release “A Spanish research team succeeds in making gold nanoparticles behave as clones” published on 2017-11-02 by CIC biomaGUNE.

SoftComp partner: CIC BiomaGUNE

 

 

 

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