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Nonlinear optical crystals lie at the core of ultrafast laser science and quantum communication technology. The emergence of 2D materials provides a revolutionary potential for nonlinear optical crystals due to their exceptionally high nonlinear coefficients. However, uncontrolled stacking orders generally induce the destructive nonlinear response due to the optical phase deviation in different 2D...
In the “post‐Moore's Law” era, new materials are highly expected to bring next revolutionary technologies in electronics and optoelectronics, wherein 2D materials are considered as very promising candidates beyond bulk materials due to their superiorities of atomic thickness, excellent properties, full components, and the compatibility with the processing technologies of traditional complementary...
Pure tetragonal hafnium oxide (t-HfO2, ca. 4.5nm) and monoclinic hafnium oxide (m-HfO2, ca. 105nm×45nm) possessing a narrow size-distribution were synthesized with an oil/water interface approach by adjusting various reaction parameters such as aging temperature, reaction time, and concentration of sodium hydroxide. The t-HfO2 and m-HfO2 were spherical and spindle-like, respectively. The formation...
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