Table 1 Single electron energy for each substance, and their energies upon binding with Al3+ and SDS (binding energies are listed in descending order).

From: Al2O3 porous ceramics with high strength by protein foaming method

Material

Material number

Electronic energy (a.u.)

Ionic bonding

Electronic energy (a.u.)

Hydrogen bonding

Electronic energy (a.u.)

Al2O3

1

/

/

/

/

/

SDS

2

−1333.357255

1 + 2

−3755.574324

/

/

(CH2)4NH3+ (Lys)

3

−496.864714

1 + 3

−1731.458142

2 + 3

−1830.248358

-CH2C6H6 (Phe)

4

−271.506972

1 + 4

−1055.149718

2 + 4

−1604.864988

CH2COO (Asp)

5

−229.005625

1 + 5

−927.843181

2 + 5

−1562.417166

-CH(CH3)2 (Val)

6

−119.11849

1 + 6

−597.960322

2 + 6

−1452.477967

-CH2OH (Ser)

7

−115.679501

1 + 7

−587.837052

2 + 7

−1449.076475