Lipoic acid-PEG-Azide (LA-PEG-N3) is a linear heterobifunctional PEG derivative featuring an azide group and a lipoic acid group at opposite ends of the PEG chain. The lipoic acid group exhibits a high affinity for metallic surfaces and is commonly utilized for surface modification of materials such as gold nanoparticles and quantum dots. Meanwhile, the azide group enables specific and efficient conjugation via click chemistry reactions with alkynes or alkyne-containing molecules, offering versatility in biomolecule labeling and functionalization.
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