The development of surface-enhanced Raman scattering (SERS)-based detectors has been inspired by a growing demand for high sensitivity and facile detection of signals corresponding to organic molecules in the fingerprint regime. Identification and quantification of molecules are of importance, particularly in practical fields such as environmental and industrial monitoring of toxic vapors, biological sensing,1–3 and medical applications.4 Because the vapor sensor using the SERS is influenced by both the SERS effect and gas adsorption, it is of importance to find a method to efficiently adsorb vapor samples to a SERS “hot spot.” Several surface modification methods for deducing organic molecule adsorption to SERS hot spots have been attempted. Goncalves et al.5 recently modified the surfaces of triangular Ag nanostructures with thiol units for detecting organic dyes. They observed intense Raman signals from the dyes adsorbed to the thiol holder units linked to Ag nanostructures, as measured by confocal microscopy. The regions showing strong near-field enhancements i.e., sharp edges of the silver triangular particles, played roles of SERS hot-spots. Deschaines et al.6 detected SERS signals from aqueous organic samples adsorbed to alkythiol units linked to Ag foils. According to this study, 1-propanethiol, which was covalently linked to Ag foil, was more effective for sensing aromatic molecules compared to 1-dodecanethiol and p-cresolthiol. The authors demonstrated that the superior property of shorter 1-propanethiol in an alkane chain length resulted in an increased SERS effect, which was enabled by closer adsorption of sample molecules to SERS hot spots.