Evaporation-controlled chemical enhancement of SERS using a soft polymer substrate
… Various thiol molecules of different sizes and types can be tested to observe SERS CM
enhancement with Au-coated polymer substrates. In summary, high-density Au NP
aggregates self-deposited on a Paraffin film over a large area proved to be very useful for
SERS studies due to their high EF. This soft substrate allowed us to examine time-dependent
EM- and CM-enhancing behaviors during solvent evaporation. By comparing the increasing
intensity rate of CM-sensitive peaks with those of EM-dominant peaks, we conclude that CM-active …
enhancement with Au-coated polymer substrates. In summary, high-density Au NP
aggregates self-deposited on a Paraffin film over a large area proved to be very useful for
SERS studies due to their high EF. This soft substrate allowed us to examine time-dependent
EM- and CM-enhancing behaviors during solvent evaporation. By comparing the increasing
intensity rate of CM-sensitive peaks with those of EM-dominant peaks, we conclude that CM-active …
An elusive chemical contribution to SERS is investigated by estimating the chemical coupling strengths through a dynamic relative peak analysis during solvent evaporation from a diluted chemical sample that is drop-deposited on a soft SERS substrate.
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