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在25mL的不锈钢反应釜中,利用无水三氯化铝与叠氮化钠在无溶剂的条件下直接反应,成功地合成出了单晶氮化铝纳米线,反应温度为450℃,有效反应时间为24h.高分辨率透射电子显微镜测试结果显示,纳米线多为长直线状外貌特征,直径在40—60nm范围内,最大长度可达几个微米.高分辨率电子衍射和X射线衍射结果都表明,多数纳米线为六方结构,也有少量呈现面心立方结构.同时,提出了长直线状六方和面心立方单晶氮化铝纳米线的生长机理的假设,并对六方单晶氮化铝纳米线生长方向的人工控制也进行了讨论.
In a 25mL stainless steel autoclave, single crystal aluminum nitride nanowires were successfully synthesized by direct reaction of anhydrous aluminum trichloride with sodium azide in the absence of solvent. The reaction temperature was 450 ℃ and the reaction was effective Time for 24h. High-resolution transmission electron microscopy test results show that most of the nanowires are long linear appearance features, the diameter of the 40-60nm range, the maximum length of up to a few microns high resolution electron diffraction and X-ray diffraction results All of them show that most of the nanowires have a hexagonal structure and a small number of face-centered cubic structures.At the same time, the hypothesis of the growth mechanism of long linear hexagonal and face-centered cubic single-crystal aluminum nitride nanowires is proposed, Artificial control of the growth direction of aluminum nanowires has also been discussed.