Table 1. Amino acid adhesion with solvent H₂O.

Adhered peptide density (×10³/μm²) as derived from fluorescence output for each of the 20 amino acids used to comprise 8- to 10-residue peptides, to each of 9 inorganic surfaces and in 1 mM H₂O. HEPES and DMSO at concentrations of 0.25 mM were also tested with grossly similar results (see Supporting Materials and Methods). The variation in intensity preparation is ≈15%. The larger the value of adhesion, the darker shading used to aid in comparison between the matrices of amino acids and inorganic surfaces. Note the prevalence of the increased adhesion of the charged side groups to the insulators and the overall lack of interaction of the amino acids to the low-oxide forming metals.