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Category: Nanotechnology

Photonic Crystals Self-Assembled From Colloidal Particles

Scientists have worked for decades to get colloidal spheres to arrange themselves in sparser lattices, which would unleash potentially valuable optical properties. The structures, called photonic crystals, could increase the efficiency of lasers, make optical components even smaller, and increase engineers’ ability to control the flow of light. Now, New York University researchers report a […]

Nanoporous Membranes With Tunable Molecular Separation

Novel membranes with selectivity that can be switched dynamically with the help of light have been developed by researchers at Karlsruhe Institute of Technology (KIT) and Universität Hannover. Azobenzene molecules were integrated into membranes made of metal-organic frameworks (MOFs). Depending on the irradiation wavelength, these azobenzene units in the MOFs adopt a stretched or angular […]

Graphene Quantum Dots Recycle Waste CO2 Into Fuel

Nitrogen-doped graphene quantum dots could represent a simple method for recycling waste carbon dioxide into valuable fuel, rather than releasing it into the atmosphere or burying it underground, say Rice University scientists. Nitrogen-doped graphene quantum dots (NGQDs) are an efficient electrocatalyst to make complex hydrocarbons from carbon dioxide, according to the research team. Using electrocatalysis, […]

Photo-induced Force Microscopy Measures Nanoparticles With Light

A new technique called “photo-induced force microscopy,” which probes the optical properties of nanomaterials by measuring the physical force imparted by light, is being tested by scientists at Rice University. Isabell Thomann’s primary research centers on using nanoparticles and sunlight to reduce the carbon footprint of power plants. A major focus is photocatalysis, a class […]

Flexible Polypropylene Ferroelectret Nanogenerator – Energy From Motion

Using a film-like device that actually can be folded to make more power, Michigan State University researchers have developed a new way to harvest energy from human motion. The low-cost device, known as a nanogenerator, successfully operated an LCD touch screen, a bank of 20 LED lights and a flexible keyboard, all with a simple […]