@article{oai:kumadai.repo.nii.ac.jp:00032284, author = {Naruo, Yuhsuke and Uechi, Seita and Sawada, Masahiro and 船津, 麻美 and Funatsu, Asami and Shimojo, Fuyuki and 下條, 冬樹 and 伊田, 進太郎 and Ida, Shintaro and Hara, Masahiro and Naruo, Yuhsuke and Uechi, Seita and Sawada, Masahiro and 船津, 麻美 and Funatsu, Asami and Shimojo, Fuyuki and 下條, 冬樹 and 伊田, 進太郎 and Ida, Shintaro and Hara, Masahiro}, issue = {43}, journal = {Nanotechnology}, month = {Jul}, note = {We have demonstrated a direct metallic conversion from nickel hydroxide nanosheets to nickel metal nanostructures by thermal annealing in vacuum. The metal transition of the single-layer nanosheets deposited on a Si substrate was revealed by x-ray absorption near edge structure (XANES) measurements. The XANES signal significantly changed at annealing temperatures above 250 °C. The metal transition temperature coincides with the reported temperatures at which layered nickel hydroxide nanosheets are converted to nickel oxide nanosheets by calcination in air. Auger measurements confirmed that a dissociation of oxygen from the hydroxide nanosheet induces the metallic conversion. The converted nickel metallic structures exhibit ferromagnetic behavior revealed by x-ray magnetic circular dichroism (XMCD) measurement. Atomic force microscopy measurements indicate that diffusions of nickel atoms on the substrates leads to a structural change from a 2D-like structure to a particle-like structure.}, title = {Ferromagnetic metal conversion directly from two-dimensional nickel hydroxide.}, volume = {31}, year = {2020}, yomi = {フナツ, アサミ and シモジョウ, フユキ and イダ , シンタロウ and フナツ, アサミ and シモジョウ, フユキ and イダ , シンタロウ} }