Mridha Subrata, Weeks Brandon L
Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409-3121, USA.
Scanning. 2009 Sep-Oct;31(5):181-7. doi: 10.1002/sca.20158.
A series of Zn ion-doped pentaerythritol tetranitrate (PETN) nanoislands in the form of thin films were prepared on Si substrates using spin coating. The effect of Zn concentrations on the sublimation energy was investigated by atomic force microscopy (AFM). The pure and Zn-doped nanoislands are imaged by AFM in contact mode at room temperature after annealing isothermally for a given time. The volume of the islands starts to decrease after annealing at 45 degrees C for pure PETN, whereas Zn-doped nanoislands start to decrease in height and volume after annealing at 55-58 degrees C. The minimum activation energy is found to be 29.7 Kcal/mol for 1,000 ppm Zn concentration. These studies are important for the long-term stabilization of PETN.
通过旋涂法在硅衬底上制备了一系列呈薄膜形式的锌离子掺杂季戊四醇四硝酸酯（PETN）纳米岛。利用原子力显微镜（AFM）研究了锌浓度对升华能的影响。在给定时间等温退火后，于室温下以接触模式用AFM对纯的和锌掺杂的纳米岛进行成像。对于纯PETN，在45℃退火后岛的体积开始减小，而锌掺杂的纳米岛在55 - 58℃退火后高度和体积开始减小。发现对于1000 ppm的锌浓度，最小活化能为29.7千卡/摩尔。这些研究对于PETN的长期稳定性很重要。
