2.1 Materials
TNT, RDX, and PETN were supplied from Hanwha Co. (Republic of Korea).
Acetone was purchased from Aldrich Chemical Co. (USA). Stainless steel
mesh (SSM) and polytetrafluoroethylene (PTFE) sheet (PFS) were supplied
from Newone S&T (Republic of Korea). Cotton fabric (COF) was purchased
from Chungoa Co. (Republic of Korea), lens cleansing paper (LCP) was
purchased from Sargent-Welch Scientific Co. (USA), polypropylene (PP)
nonwoven (PPN) was purchased from Thesoop Co. (Republic of Korea),
acrylate fabric (APF), poly(ethylene terephthalate) (PET) fabric (PTF),
and polyamide (PA) fabric (PAF) were purchased from Dawon Co. (Republic
of Korea), carbon nonwoven (CFN) was purchased from GNT filter Co.
(Republic of Korea), carbon plain/twilled fabrics (CPF and CTF,
respectively) and carbon fabrics (CF720 and CF730) (CF2 and CF3,
respectively) were purchased from Hankuk Carbon Co. (Republic of Korea),
filter paper (FPP) was purchased from Hyundai Micro Co. (Republic of
Korea), and coffee filter (CFP) was purchased from Thomas & Green Co.
(Singapore). Only SSM is made of metal and has mesh structure.
Collection matrices with woven fabric structures are PFS, COF, APF, PTF,
PAF, CPF, CTF, CF2, and CF3, while those with nonwoven structures are
LCP, PPN, CFN, FPP, and CFP (Table S1 and Figure S1; Supplementary
Information).