1 2 dipalmitoyl 3 trimethylammonium propane

1,2-Dipalmitoyl-sn-glycero-3-phosphocholine, 1, 2-dipalmitoyl-sn-glycero-3-phosphoglycerol, and 1,2-dipalmitoyl-3-trimethylammonium-propane were purchased from Avanti Polar Lipids (Alabaster, AL, USA). Au NRs (40 × 10 nm) were purchased from Nanopartz (Loveland, CO, USA). Poly(ethyleneglycol)-thiol (MW 5000 g/mol) was purchased from Nanocs (New York, NY, USA). 1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetic acid (DOTA) was purchased from Fisher Scientific (Pittsburgh, PA, USA). Ascorbic acid was purchased from Sigma Aldrich (St. Louis, MO, USA). ⁶⁴Cu was produced by the PET Department, NIH (Bethesda, MD, UA). Deionized (DI) water with a resistivity of 18.0 MΩ was obtained from a Millipore Autopure system (EMD Millipore, Billerica, MA, USA).