Teng HH, Dove PM, Orme CA
H. H. Teng and P. M. Dove, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA. C. A. Orme and J. J. De Yoreo, Department of Chemistry and Materials Science, Lawrence Livermore National Laboratory, Liverm.
Science. 1998 Oct 23;282(5389):724-7. doi: 10.1126/science.282.5389.724.
The complexity of biomineralized structures suggests the potential of organic constituents for controlling energetic factors during crystal synthesis. Atomic force microscopy was used to investigate the thermodynamic controls on carbonate growth and to measure the dependence of step speed on step length and the dependence of critical step length on supersaturation in precisely controlled solutions. These data were used to test the classic Gibbs-Thomson relationship and provided the step edge free energies and free energy barriers to one-dimension nucleation for calcite. Addition of aspartic acid, a common component in biomineralizing systems, dramatically affected growth morphology and altered the magnitude of the surface energy.
生物矿化结构的复杂性表明有机成分在晶体合成过程中控制能量因素的潜力。利用原子力显微镜研究了碳酸盐生长的热力学控制，并测量了在精确控制的溶液中台阶速度对台阶长度的依赖性以及临界台阶长度对过饱和度的依赖性。这些数据用于检验经典的吉布斯-汤姆逊关系，并提供了方解石一维成核的台阶边缘自由能和自由能垒。添加天冬氨酸（生物矿化系统中的常见成分）显著影响了生长形态并改变了表面能的大小。
