Figure 5.

The absorption maximum for the ssDNA–GNPs conjugates as the solution pH is cycled between 7.0 and 1.0 by adding 1 M NaOH or 1 M HCl. ssDNA: 273G–T

Sun et al. Nanoscale Research Letters 2008 4:216-220   doi:10.1007/s11671-008-9228-z