The researchers soaked 10 different layered materials, including graphite and molybdenum disulfide, in liquid ammonia sprinkled with lithium or potassium. The baths enable metal atoms to work themselves between the sheets of a layered material. Once removed from the ammonia, a metal-loaded material is given a dip in aprotic organic solvents. Here, negatively charged single layers of the stacked material, such as molybdenum disulfide, flake off, leaving alkali-metal cations (Nat. Chem. 2016, DOI: 10.1038/nchem.2650). The 2-D flakes can then be transferred to a substrate by simply letting the liquid dry or by electroplating. /articles/94/i47/flaky-solution-improving-coverage-2.html 20161128 Metals and organic solvents help disperse flakes of a variety of 2-D materials to make new substrate coatings Concentrates 94 47 /magazine/94/09447.html A flaky solution for improving coverage of 2-D materials 2-D materials, graphene, ionic solution con scitech Matt Davenport materials Single sheets of bismuth telluride, about 100 nm across, were deposited using an ionic solution of the 2-D material and electroplating.Single sheets of bismuth telluride, about 100 nm across, were deposited using an ionic solution of the 2-D material and electroplating.
by Matt Davenport |
November 28, 2016