Dissertation > Excellent graduate degree dissertation topics show

Experimental Research of Calcium Carbonate Crystal Growth in Gels

Author: ChenChen
Tutor: LiMingWei
School: Chongqing University
Course: Thermal Power Engineering
Keywords: calcium carbonate crystal growth biomineralization gel method polymorph Atomic force microscopy
CLC: O782
Type: Master's thesis
Year: 2006
Downloads: 454
Quote: 1
Read: Download Dissertation


Because mineral crystallization is regulated by the organic matrix excreted by the biology, and organic matrix can induce the inorganic materials to crystallize and grow, the biomineralization is quite different from the common mineral crystallization in nature. It is generally accepted that the control of organic matrix over crystal growth, morphology and polymorphism is due to the molecular recognition between organic-inorganic interfaces, by which the organic matrix can act on crystal selectively.Calcium carbonate is one of the most important inorganic minerals and used in many fields. However, being a biomaterial, calcium carbonate receives considerable interest from many branches of science just in recent years. Its properties are controlled by the composite character and in particular the morphology of calcium carbonate. The researches on biomineralization will provide new pathways to study the mechanism of biogenic calcium carbonate and to fabricate advanced organic-inorganic composite calcium carbonate. In the thesis, calcium carbonate crystals grew in agarose gels or silicon gels by gel method, equally further knowledge about growth morphology and mechanism of calcite crystals can be obtained by AFM investigations, which is useful to guide the practical crystal growth process.In the thesis, agarose gels are mainly used to regulate and control the growth progress of calcium carbonate crystals under present conditions. In our experiments, versatile morphologies, diverse nucleation amount and different polymorphs of calcium carbonate crystals are grown by changing experience parameters, such as reactants concentration, pH of gels, gels concentration, temperature and Na +. Especially, the crystals grown in agarose gels and in silicon gels differ in many ways. Meanwhile, the mechanisms of these results and the gel method are investigated. The experimental results provide authentic theory to improve gel method.The research utilizes AFM to observe the growth morphology of calcites, which grew in silicon gels or agarose gels by altering reactants concentration. The images indicate that growth morphologies of calcites are dissimilar in different gels, although these crystals show similar growth mechanism. Analyzing the formation of growth morphology, the research proves that the crystal defects affect crystal growth. It can be concluded that the 2D nucleation and crystal defects control calcite growth.

Related Dissertations

  1. Study on the Synthesis Bi3.25La0.75Ti3O12(BLT) Nanotubes and Nano Wires,TB383.1
  2. The DAST crystal material synthesis and crystal growth,O782.1
  3. The Research on Preparation Technology and Sintering Behavior of Rare Earth Aluminates (Dy3Al5O12、 NdAlO3、LaAl11O18),TB383.3
  4. Studies of High Refractive Index Materials Prepared by Nano ZrO2 and TiO2 Hybrid Silicone Epoxy Resin,TB383.1
  5. Preparation and Characterization of Al2O3/C Hybrid Aerogels and Al2O3 Aerogels,O648.17
  6. Research on the Optimization and Mechanism of Copper Electrochemical Mechanical Planarization,TG174.42
  7. Biomimetic Synthesis of Nacre Composite,TB332
  8. Different crystal form of calcium sulphate crystal growth studies,O614.231
  9. Crystallization of Calcium Carbonate on Chitosan and Silk Fibroin Substrates,O614.231
  10. Controll Morphology of Mg(OH)2 in Flame-Retardance and Its Modification,O614.22
  11. Fabrication and Magnetic Properties of Mn-Zn Ferrites,TM277
  12. Fundamental Studies of Calcium Carbonate Mineralization Induced by Microbiologically in Stone Materials Surface Protection,Q93
  13. Effect of Oral Calcium Carbonate Suspension on the Treatment of Acid Related Diseases,R57
  14. Molecular Dynamics Study of Chiral Molecule Self-assembled Monolayer and Nucleation Phenomenon in Calcium Carbonate Solution,O614.231
  15. Synthesis and Electrochemical Properties of LiVxFe1-xPO4/C Cathode Materials,TM910.4
  16. Synthesis and Characterization of Li3v2(po4)3 As Cathode Materials for Lithium-ion Batteries,TM912
  17. Preparation and Photocatalytic Characterization of Electrospun Silica-doped Titania Fiber,TQ343
  18. Research on Modified Li3V2(PO43 Cathode Materials for Lithium-ion Battery,TM912
  19. Synthesis and evaluation of new non-phosphorus ANTISCALANT,TQ085.4
  20. The Biomimetic Synthesis of Mineral Materials,TB321
  21. Experimental Study on Mineralization of Hydroxyapatite Crystals Induced by Phosphate Dentin Adhesive,R783.1

CLC: > Mathematical sciences and chemical > Crystallography > Crystal growth > Crystal growth process
© 2012 www.DissertationTopic.Net  Mobile