Fig. 2 | Nature Communications

Fig. 2

From: Plasmonic silver nanoshells for drug and metabolite detection

Fig. 2

Selection of optimized SiO2@Ag. LDI MS analysis of 10 ng μL−1 a mannitol, b glucose, and c methionine in the positive ion mode using SiO2@Ag-1, SiO2@Ag-2, SiO2@Ag-3, and SiO2@Ag-4 as matrices, including typical mass spectra showing silver-adducted molecular peaks of theses metabolites and mean intensities of signals obtained using different SiO2@Ag particles as matrices. The error bars were calculated as s.d. of three measurements (p < 0.05, one-sided t-tests). Mass spectra of d 2 nM lysine, methionine, arginine, and phenylalanine in 0.5 M NaCl and e 2 nM leucine, methionine, arginine, and glucose in 5 mg mL−1 bovine serum albumin solution with a KCl concentration of 0.5 M