PEG2000@ Fe3O4 Carboxyl end

PEG2000@ Fe3O4 Carboxyl end

PEG2000@ Fe3O4 Animo end

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PEG2000@ Fe3O4 Methoxy group end

PEG modified Au nanorods（2.9）Carboxyl end

PEG modified Au nanorods（6.5）（Carboxyl end）

PEG modified Au nanorods（2.7）Carboxyl end

PEG modified Au nanorods（3.2）Carboxyl end

PEG modified Au nanorods（5.1）Carboxyl end

PEG modified Au nanorods（2.0）Carboxyl end

PEG modified Au nanorods（4.3）Carboxyl end

PEG modified Au nanorods（2.5）Carboxyl end

PEG modified Au nanorods（6.0）（Carboxyl end）

PEG modified Au nanorods（3.7）Carboxyl end

PEG modified Au nanorods（4.1）Carboxyl end

PEG modified Au nanorods（5.4）（Carboxyl end）

PEG modified Au nanorods（3.6）Carboxyl end

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