Part I. The Silica Surface. 1. Silica: Preparation and properties. 2. Physical characterization of the silica surface. 3. The surface chemistry of silica. 4. Quantification of the silanol number. 5. The distribution of the silanol types and their desorption energies. 6. The effect of surface morphology on the dehydroxylation behaviour. 7. Related materials: Silicates. Part II. Chemical Modification of the Silica Surface. 8. Chemical modification of silica: Applications and procedures. 9. Modification with silicon compounds: Mechanistic studies. 10. Modification with boron compounds. 11. Modification with other compounds. 12. Ammoniation of modified silica: Introduction of functional groups. Part III. Chemical Surface Coating. 13. Coating techniques. 14. Chemical surface coating. Appendices. Surface Analysis Techniques. Appendix A. FTIR-PAS. Fourier transform infrared spectroscopy with photoacoustic detection. Appendix B. XPS. X-Ray photoelectron spectroscopy. Appendix C. 29Si CP MAS NMR. Cross polarization magic angle spinning nuclear magnetic resonance. Appendix D. Surface science techniques. Author index. Subject index.