A Korean research team has developed a lithium-ion battery that is flexible enough to be stretched. Dr. Jeong Gon Son's research team at the Photo-Electronic Hybrids Research Center at the Korea Institute of Science and Technology (KIST) announced that they had constructed a high-capacity, stretchable lithium-ion battery. [39] Such human-machine interfaces are no longer science fiction, but they still have a way to go before becoming mainstream. [38] With further engineering, the vertical semiconductor-graphene-semiconductor transistor is promising for high-speed applications in future 3-D monolithic integration because of the advantages of atomic thickness, high carrier mobility, and the high feasibility of a Schottky emitter. [37] Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have new experimental evidence and a predictive theory that solves a long-standing materials science mystery: why certain crystalline materials shrink when heated. [36] In a new study now published A team of scientists are seeking to kick-start a wearable technology revolution by creating flexible fibres and adding acids from red wine. [33] An inexpensive way to make products incorporating nanoparticles-such as high-performance energy devices or sophisticated diagnostic tests-has been developed by researchers. [32] Researchers from Empa and ETH Zurich, together with colleagues from IBM Research Zurich, have recently been able to create this effect with long-range ordered nanocrystal superlattices. [31]