It sounds too good to be true - but US scientists have developed a substance that they say can be sprayed onto suspected explosives to detect and completely neutralize them.
Can't find a pair of skinny jeans that's tight enough? Look no further. A British team has developed a fabric that can simply be sprayed onto the body.
The National Institute of Standards and Technology (NIST) is using organic semiconductors as a basis for spray-on large-area electronics such as solar cells and displays.