Optical emission spectroscopic study of Ar/H₂/CH₄plasma during the production of graphene nano-flakes by induction plasma synthesis

Investigation of plasma‐induced chemistry in organic solutions for enhanced electrospun PLA nanofibers

“…The observed intensity changes in the atomic argon emission lines in the plasma‐solution system could be due to changes in the electron energy distribution . Additional transition lines from carbon fragments were present in the optical emission spectrum of the plasma‐solution system: a CH band (X 2 ∏←B 2 ∑ − and X 2 ∏←A 2 Δ) at 386.89 and 431.19 nm, respectively, and the Swan system of C 2 lines (X 3 ∏ u ←A 3 ∏ g ) at 473.5, 516.29, 558.11, and 563.26 nm . In addition, low intensity emission lines are also present, as can be seen in the inset of Figure b: a CN band (X 2 ∑ + ←B 2 ∑ + ) at 416.13 nm, an NH band (X 3 ∑ − ←A 3 ∏) at 336.52 nm, and an Ar line (1s 4 ←3p 5 ) at 419.72 nm .…”

“…In addition, low intensity emission lines are also present, as can be seen in the inset of Figure b: a CN band (X 2 ∑ + ←B 2 ∑ + ) at 416.13 nm, an NH band (X 3 ∑ − ←A 3 ∏) at 336.52 nm, and an Ar line (1s 4 ←3p 5 ) at 419.72 nm . The presence of these additional transition lines suggests that PLA solution components (PLA polymer chains and/or solvent molecules) were possibly partially fragmented by the argon plasma jet during PEPT …”

Plasma Modification of Poly Lactic Acid Solutions to Generate High Quality Electrospun PLA Nanofibers

“…4 ): a CN emission band ( ) located at 416.13 36 , CH emission bands located at 386.89 nm ( ), and 431.19 nm ( ) 32 , 37 – 39 , an NH band ( ) located at 336.52 nm 40 , Ar ( ) located at 419.72 nm 41 , and the Swan system of lines ( ) located at 473.5, 516.29, 558.11, and 563.26 nm 32 , 42 , 43 . The presence of these additional peaks suggest that the PLA solution components are directly dissociated by the argon plasma jet 32 , 37 , 38 , 42 .…”

In‐Liquid Plasma Synthesis of Nanographene with a Mixture of Methanol and 1‐Butanol

“…For ethanol or 1‐butanol in‐liquid plasma, broad radiation is observed originating from the blackbody radiation of the synthesized carbon nanomaterials in the in‐liquid plasma. The blackbody temperature ( T ) can be calculated using Wien's displacement law given by , where λ max is the peak wavelength of the fitted broad blackbody radiation.…”