MALDI images of (a) PE 38a:4-H, 766.539 Da, (b) PE 40a:6-H, 790.539 Da, (c) PE 36a:2-H, 742.539 Da, (d) PE 36a:4-H, 738.508 Da, (e) PE 36p:4-H, 722.513, (f) combo of 738.508 (green) and 722.513 (red), (g) PI 38a:4-H, 885.555 Da, (h) PI 36a:2-H, 861.555 Da, (i) combo of 885.555 (red) and 861.555 (green), (j) PG 34a:1-H, 747.518 Da, (k) CL 72:8+Na-2H, 1469.9, and (l) CL 72:8+K-2H, 1485.9 in heart tissue section with AgNPs in negative mode