Refractive index matched polymeric and preceramic resins for height-scalable two-photon lithography.

ABSTRACT: Nanofabrication techniques that can generate large and complex 3D structures with nanoscale features are becoming increasingly important in the fields of biomedicine, micro-optics, and microfluidics. Direct laser writing via two-photon polymerization (DLW-TPP) is one such technique that relies on nonlinear absorption of light to form nanoscale 3D features. Although DLW-TPP provides the required nanoscale resolution, its built height is often limited to less than a millimetre. This height limitation is driven by the need to tightly focus the laser beam at arbitrary depths within the photopolymer. This requirement necessitates matching the photopolymer's refractive index to specific values but the required techniques have not been disseminated widely in the open scientific literature.

SUBMITTER: Mettry M 

PROVIDER: S-EPMC9034411 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature