Combustion engines, the engines in gas-powered cars, only use a quarter of the fuel’s potential energy while the rest is lost as heat through exhaust. Now, a study published in ACS Applied Materials & Interfaces demonstrates how to convert exhaust heat into electricity. The researchers present a prototype thermoelectric generator system that could reduce fuel consumption and carbon dioxide emissions — an opportunity for improving sustainable energy initiatives in a rapidly changing world.

A carnation-like nanostructure could someday be used in bandages to promote wound healing. Researchers report in ACS Applied Bio Materials that laboratory tests of their nanoflower-coated dressings demonstrate antibiotic, anti-inflammatory and biocompatible properties. They say these results show these tannic acid and copper(II) phosphate sprouted nanoflower bandages are promising candidates for treating infections and inflammatory conditions.

Zaps of static electricity might be a wintertime annoyance, but to certain scientists, they represent an untapped source of energy. Using a device called a triboelectric nanogenerator (TENG), mechanical energy can be converted into electrical energy using triboelectric effect static. Many TENGs contain expensive, specially fabricated materials, but one team has instead used inexpensive store-bought tape, plastic and aluminum metal. The researchers report an improved version of their tape-based TENG in ACS Omega.