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TEM images of Au nanoshells and nanorods that were purchased from a commercial supplier and synthesized in-house. Synthesized Au nanoshells (A) are 135 nm in diameter, with an approximate shell thickness of 10 nm, while commercial Au nanoshells (B) are 145 nm in diameter, with a 7.5 nm thick Au shell. Synthesized nanorods (C) are 49 × 13 nm (aspect ratio: 3.8) and commercial nanorods (D) are 23 × 7 nm (aspect ratio: 3.3).
