Novel Photoacid Generators.

Microwave-Assisted Formation of Sulfonium Photoacid Generators

Characterization of novel sulfonium photoacid generators and their microwave-assisted synthesis.

Microwave-assisted synthesis of triarylsulfonium salt photoacid generators (PAGs) afforded reaction times 90 to 420 times faster than conventional thermal conditions, with photoacid quantum yields of new sulfonium PAGs ranging from 0.01 to 0.4.

Investigation of Acid diffusion during laser Spike Annealing with Systematically designed Photoacid generators

The post-exposure bake in the lithographic process has a primary influence on resist performance as the time/temperature profile controls both the diffusion of photogenerated acids and the deprotection of the resist backbone. We utilize a laser (CO2) based scanned heating system to achieve sub-millisecond heating durations with temperatures up to the thermal decomposition limit of the resist. T...

Holographic Recording in Cross-Linked Polymeric Matrices through Photoacid Generation

We report a novel strategy for writing volume holograms by photoacid generation and subsequent acid-catalyzed degradation leading to increased free volume/refractive index modulation in the exposed regions of a cross-linked rigid polymeric matrix. This strategy offers nondestructive read out and high diffraction efficiency and allows optical-quality, millimeter thick films to be fabricated that...

Development of Novel Radionuclide Generators for Use in Nuclear Medicine

Introduction Over the last 5 decades, radionuclide generators have attracted substantial attention, indeed close scrutiny of the nuclear medicine community owing to their ability to provide short-lived radioisotopes without the need for on-site nuclear reactor or cyclotron facilities for preparation of a wide variety of diagnostic and therapeutic radiopharmaceuticals [1]. The radionuclide gener...