keywords Asymmetric surface charge BACTERIAL-CELLS Bacteria Biosilicification CIRCUMNEUTRAL PH COPPER UPTAKE CYANOBACTERIAL MAT Cell polarity ESCHERICHIA-COLI ADHESION Geochemistry & Geophysics HOT-SPRING SINTERS Metabolic biomineralization patterns NEW-ZEALAND Physical Sciences SILICA PRECIPITATION SURFACE Science & Technology Surface reactions YELLOWSTONE-NATIONAL-PARK