Dataset for: Simultaneous Chemical and Refractive Index Sensing in the 1-2.5 micron Near-Infrared Wavelength Range on Nanoporous Gold Disks

We developed a new method to obtain chemical and refractive index sensing between the 1 and 2.5 micron near-infrared wavelength on nanoporous gold (NPG) disks. We fabricated NPG disks in the laboratory by sputtering a gold-silver alloy film onto a glass substrate at approximately 80 nm thickness. Polystyrene beads were deposited onto the alloy film in a single layer and were reduced in size using an oxygen plasma treatment. The bead pattern was transferred onto the alloy using a sputter-etch method in argon plasma. After etching, the alloy was sonicated in chloroform to remove residual beads. The disks were then dealloyed using nitric acid. We measured infrared absorption using dispersive scanning UV-Vis-NIR and FT-IR inteferometric spectrometers. This dataset reports the extinction spectra of water on NPG disks with diameters of either 350 or 600 nm. For NPG disks of 350 nm diameter the extinction spectra are also provided for 6 other solvents with different refractive indices: salt water, ethanol, hexane, iso-octane, hexadecane, and toluene. We examined the surface-enhanced near-infrared absorption of 350 nm and 600 nm diameter NPG disks with a self-assembled monolayer (SAM) of octadecanethiol (ODT) and report the extinction spectra in this dataset. The surface-enhanced near-infrared absorption (SENIRA) spectra of each of hexadecane, dodecane, siloxane, pyrene, and Louisiana sweet grade crude oil on either 350 nm or 600 nm NPG disks is reported in this dataset. Lastly we deposited a film poly(methyl methacrylate) (PMMA) of varying thickness onto the NPG disk substrate. The PMMA films varied in thickness from 50-150 nm. The surface-enhanced near-infrared absorption spectra of 350 nm and 600 nm NPG disks on films of 50-150 nm in thickness is reported in this dataset, as well as the wavelength shift at 1398 nm. This dataset is associated with the paper: Shih, W. - C., Santos, G. M., Zhao, F., Zenasni, O., & Arnob, M. M. P. (2016). Simultaneous Chemical and Refractive Index Sensing in the 1-2.5 μm Near-Infrared Wavelength Range on Nanoporous Gold Disks. Nano Lett., 16(7), 4641–4647, doi:10.1021/acs.nanolett.6b01959.