A novel approach to regulate nanoparticles morphology using capping agents (etidronic, succinic, tartaric and salicylic acids) in hydrothermal synthesis is presented. UV–Vis and FTIR spectra showed that influence of the capping agents is based on the interaction with particles surface during the solid phase formation. For na-VO₂ nanorods a 1st order phase transition at 275 K was demonstrated using vibration sample magnetometry. Differential scanning calorimetry showed that this transition is accompanied by 2nd order transition at 320 K. Decrease in rods thickness and length for sal-VO₂ and suc-VO₂ made the transition less expressed and its temperature lowered from 275 to 150 K. Addition of tartaric and etidronic acids led to change of particles shape from rods to spheres and eliminated all the transitional changes in magnetic properties. Charge-discharge tests revealed that initial discharge capacity of nanorods was 100 mA h g⁻¹, which is three times higher than that of spheres.

提出了一种在水热合成中使用封端剂（乙二酸，琥珀酸，酒石酸和水杨酸）调节纳米颗粒形态的新方法。UV-Vis和FTIR光谱表明，封端剂的影响基于固相形成过程中与颗粒表面的相互作用。对于na-VO ₂纳米棒，使用振动样本磁力分析法证明了在275 K处的一阶相变。差示扫描量热法显示该转变伴随着在320 K处的二阶转变。sal-VO ₂和suc-VO _2的棒厚度和长度减小使转变的表达减少，温度从275降低到150K。酒石酸和乙二酸的添加导致粒子形状从棒状转变为球形，并消除了磁性的所有转变。充放电测试表明，纳米棒的初始放电容量为100 mA h g ^-1，是球体的三倍。