IR and SFM study of PTCDA thin films on different substrates

Infrared vibrational nanocrystallography and nanoimaging

“…Our IR s-SNOM optical nano-crystallography and nano-imaging show the presence of well-oriented PTCDA in macroscopically disordered drop-cast crystallites. Conversely, vacuum-deposited PTCDA is macroscopically ordered in the crystalline thin film, with molecules primarily oriented with q ≃ 10°to 20°, in close agreement with previous ensemble-averaged measurements (26). However, we found nanoscale spatial variation of molecular orientation in otherwise morphologically well-ordered regions of the vacuum-deposited thin film.…”

“…1C ). However, the morphology is sensitive to growth conditions ( 23 – 25 ), substrate interactions ( 26 ), surface polymorphs distinct from the bulk phase ( 27 , 28 ), minority phases ( 29 ), and defects. Although the structure in PTCDA and related molecular materials has been investigated at length scales ranging from molecular adsorption conformation to ensemble-averaged crystallinity, a unified understanding of defects and domain structure remains elusive.…”

Diffusion Control of Organic Cathode Materials in Lithium Metal Battery

“…Attenuated total reflectance FT-IR analysis showed that both surfaces of cycled Celgard separators contain PTCDA, as indicated by the presence of the characteristic 1750 cm −1 carbonyl band (see Supplementary Fig. 11) 39 . No PCTDA was detected on the anode side of the G-separator, indicating that the graphite layer blocked PTCDA diffusion under cycling conditions.…”

Inorganic/organic small molecular semiconductor self-assembly to functional core–shell nanoarchitectures for ultrasensitive chemiresistors to aniline vapor

“…1d, and the typical quadruple absorption peaks at 1772 cm −1 , 1758 cm −1 , 1742 cm −1 and 1730 cm −1 of two anhydride groups indicated the presence of PTCDA. 40 UV-vis absorption spectra of ZPNPs (Fig. S2b †) displayed the characteristic absorbed peaks of PTCDA and ZnS NPs.…”