  Conventional microparticle transports by light or sound are realized along a
straight line. Recently, this limit has been overcome in optics as the growing
up of the self-accelerating Airy beams, which are featured by many peculiar
properties, e.g., bending propagation, diffraction-free and self-healing.
However, the bending angles of Airy beams are rather small since they are only
paraxial solutions of the two-dimensional (2D) Helmholtz equation. Here we
propose a novel micromanipulation by using acoustic Half-Bessel beams, which
are strict solutions of the 2D Helmholtz equation. Compared with that achieved
by Airy beams, the bending angle of the particle trajectory attained here is
much steeper (exceeding 90o). The large-angle bending transport of
microparticles, which is robust to complex scattering environment, enables a
wide range of applications from the colloidal to biological sciences.
