Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 2, Issue 9, Pages 2475-2480Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am100463z
Keywords
hyperbranched polymer; ultrathin film polymer dielectrics; dead interfacial capacitance; atomic force microscopy; ATRP
Funding
- National Science Foundation [09-69301]
- CRP Consortium at Carnegie Mellon University
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [969301] Funding Source: National Science Foundation
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Thermocurable hyperbranched polystyrenes were successfully synthesized using atom transfer radical polymerization and exhibited superior ultrathin film formation capabilities in comparison with the linear analogues, as assessed by the minimal film thickness attainable by spin-coating without dewetting. They were suitable as ultrathin film organic dielectrics, with parallel plate specific capacitances as high as similar to 680 nF/cm(2). Similar to high performance inorganic dielectrics, capacitance measurements pointed to the presence of dead interfacial capacitance, which could be accounted for by considering the geometric effect of roughness incommensurability between metal electrode and polymer film.
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