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Abstract
Abstract New, stable, and glyoco-derivatized gold nanorods (GNRs) were prepared using developed amphiphilic block glycopolymers poly[(lactose)m-b-(pyridine)n] to engineer self-organized, densely packed glycopolymeric recognition layers and generate a multivalent binding cavity onto the gold surface. We report a rapid and ultrasensitive biosensing for the weak affinity of protein–carbohydrate binding employing a combination of the longitudinal SPR of GNRs and the cluster glycoside effect. Thus, a very small amount of lectin (100 pg mL−1 = 8.3 × 10−13 M) was detected by the aggregation of GNRs.
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