Figure 4.

UV–vis absorption spectra and colorimetric response. (I) E. coli O157:H7 with A1/AuNPs. (II) PBS with A1/AuNPs. (III) E. coli O111 with A1/AuNPs. (IV) E. coli O157:H7 with R1/AuNPs.

Wu et al. Nanoscale Research Letters 2012 7:658   doi:10.1186/1556-276X-7-658
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