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Direct localized surface plasmon resonance (LSPR) sensor using anisotropic gold nanoparticles with bipyramidal structure namely as gold nanobipyramids (GNBPs) has been proposed. The high curvature at the tips of GNBPs enhanced LSPR effect owing to electron-rich sites thus improved sensor performance. In this study, we demonstrated that GNBPs-based LSPR sensor is sensitive and can detect the presence of glyphosate as low as 0.1 % (w/w). Our experimental studies show that the GNBPs-based LSPR sensor exhibits improved sensitivity compared to the gold bone nanorods (GBNRs) and gold nanorods (GNRs)-based LSPR sensor. For t-SPR band, the GNBPs provided sensitivity factor as high as 4.76 and 5.17 times larger than the sensitivity factor of GBNRs and GNRs, while for l-SPR band, the sensitivity factor of GNBPs are 2.87 times larger than GBNRs and 1.57 times larger than GNRs. The selectivity …