改良的热板法制备氧化钼纳米片

Modified Hot Plate Method for Synthesizing MoO3 Nanoplates

三氧化钼(MoO_(3))具有层状结构,在电子和光电子器件领域有着良好的应用前景.本文报道了一种改良的热板法来生长大尺寸的MoO_(3)晶体.这种方法能够在常压气氛下实现快速生长MoO_(3),具有低成本和操作简单等优点.通过改变源温度和衬底种类,可以很好地控制MoO_(3)晶体的生长速率和形貌.同时,通过光学显微镜、原子力显微镜、X射线衍射、拉曼光谱和扫描近场光学显微镜等手段,探究了其结构和物理性质.结果表明,MoO_(3)晶体在具有大尺寸的同时还表现出良好的结晶度.此外,还观察到所制备的MoO_(3)晶面上的双曲声子极化子现象,这一现象有望推动其在纳米电子和纳米光子器件中的应用.

Molybdenum trioxide(MoO_(3))with layered structures adopts exotic physical features,which has evoked an extensive interest in electronic and photoelectronic devices.Here,we report a low-cost,simplehandle,atmospheric-pressure,and rapid-synthesis technique for growing large-scale MoO_(3) crystals,i.e.,a modified hot plate method.The growth rate and morphology of the MoO_(3) crystals were well controlled by changing source temperatures and substrates.Complementary measurements,including optical microscope,atomic force microscope,X-ray diffraction,Raman spectroscope,and scanning near-field optical microscope,were used to investigate the structural and physical properties.The results reveal that large-scale MoO_(3) crystals with well-defined crystallinity have been obtained.Meanwhile,surface hyperbolic phonon polaritons on as-prepared MoO_(3) crystal planes have also been observed,which may provide an attractive insight into nanoelectronic and nanophotonic devices.