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Home > Press > Plasmon-coupled gold nanoparticles useful for thermal history sensing Peak wavelength of the polarized optical extinction spectrum as a function of the recovery temperature, showing the temperature-dependent behavior that can be applied for optical thermal-history sensors. Image credit: Mehedi H. Rizvi. Abstract: Researchers have demonstrated that stretching shape-memory polymers embedded with clusters of gold nanoparticles alters their plasmon-coupling, giving rise to desirable optical properties. One potential application for the material is a sensor that relies on optical pr...

Our NanoNews Digest Sponsors Home > Press > Shedding light on perovskite films: Efficient materials for future solar cells - New model to determine photoluminescence quantum efficiency In terms of efficiency, perovskite solar cells have caught up on silicon solar cells, but some of their properties are not yet understood completely. CREDIT Markus Breig, KIT Abstract: Photovoltaics decisively contributes to sustainable energy supply. The efficiency of solar cells in directly converting light energy into electrical energy depends on the material used. Metal-halide perovskites are considered ver...

Nanotechnology Now Home > Press > Confined magnetic colloidal system for controllable fluid transport Schematics of confined colloids in different states via remote and dynamic magnetic regulation CREDIT ©Science China Press Abstract: Colloidal suspensions of microscopic particles show complex and interesting collective behaviors. In particular, the collective dynamics of colloids is fundamental and ubiquitous for materials assembly, robotic motion, microfluidic control, and in several biological scenarios. The collective dynamics of confined colloids can be completely different from that of...

Regardless if strained or compressed, the new material always expands. CREDIT Thomas Heine et al. Abstract: If you stretch an elastic band, it becomes thinner - a physical behavior that applies to most "common" materials. Since the 20th century, an opposite behavior has been known in materials research: The so-called auxetic (from ancient Greek auxetos, meaning 'stretchable') materials expand in the direction orthogonal to the strain. Likewise, they shrink when they are compressed. Scientifically, they are characterized by a negative Poisson's ratio. Probably the best known and oldest applica...

Our NanoNews Digest Sponsors Home > Press > CEA-Leti Envisions Widespread Use of LiDAR Systems Based on Integrated Optical Phased Arrays (OPAs): OPAs with Solid-State Beam Steering Can Reduce the Cost and Size of LiDAR Systems & Improve Performance; Results Reported at Photonics West 2021 Abstract: Taking a critical step toward developing LiDAR systems for widespread commercial applications, CEA-Leti has developed genetic algorithms to calibrate high-channel-count optical phased arrays (OPAs), as well as an advanced measurement setup enabling wafer-scale OPA characterization. CEA-Leti Envisi...