Hot summer weather, stressful situations and intense workouts can produce unpleasant sweaty odors. But what if clothing could cover up these embarrassing smells with a burst of fragrance? Now, researchers have modified cotton fabric to emit a lemony citronella aroma upon contact with sweat. They report their body-odor-fighting strategy in ACS Applied Materials & Interfaces.

In recent years, scientists have developed smart fabrics that react to stimuli such as light, temperature or mechanical stress and respond in certain ways, such as by changing color or conducting an electrical signal. Researchers have also explored different methods to release fragrances from fabrics. Carla Silva, Artur Cavaco-Paulo and colleagues wanted to develop and compare two new strategies for releasing a fragrance -- β-citronellol, a lemongrass-derived scent used in some insect repellants -- from cotton fabric in response to sweat. Read More