Articles you may be interested inIn-situ probing of metallic glass formation and crystallization upon heating and cooling via fast differential scanning calorimetry Appl. Phys. Lett. 104, 251908 (2014); 10.1063/1.4884940Effect of oxygen environment on formation of modulated Ag nanostructures along the interface of a Ag-Si heterostructureWe have investigated the stability and solidification of nanometer size Au-Si droplets using an ultrafast heating/cooling nanocalorimetry and in situ growth techniques. The liquid can be supercooled to very low temperatures for both Au-rich (DT $ 95 K) and Si-rich (DT $ 220 K) samples. Solidification of a unique metastable phase d 1 is observed with a composition of 74 6 4 at. % Au and a b-centered orthorhombic structure (a ¼ 0.92, b ¼ 0.72, and c ¼ 1.35 nm; body-center in the a-c plane), which grows heteroepitaxially to Au s . Its melting temperature T m is 305 6 5 C. There is competition during formation between the eutectic and d 1 phases but d 1 is the only metastable alloy observed. For small size droplets, both the d 1 and eutectic phases show considerable depression of the melting point (size-dependent melting). V C 2012 American Institute of Physics. [http://dx.