REVIEW Surface charge: CTAB (Hexadecyltrimethylammonium bromide) is a cationic surfactant that can provide positive charge to gold nanoparticles, which helps improve their stability and interaction in biological systems. Stability: The long-chain alkyl portion of CTAB can form a protective layer to prevent the aggregation of gold nanoparticles, thereby improving its stability in aqueous media. Easy to disperse: CTAB modified gold nanoparticles are easily dispersed in water and suitable for aqueous chemical reactions and biomedical applications. Environmental impact: The biodegradability and environmental safety of CTAB AuNPs are important aspects of research to ensure their environmental friendliness in practical applications.
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