Abstract:

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.

Suggested Citation:

Wei-Chuan Shih, Greggy M. Santos, Fusheng Zhao, Oussama Zenasni, Md Masud Parvez Arnob. 2017. Dataset for: Simultaneous Chemical and Refractive Index Sensing in the 1-2.5 micron Near-Infrared Wavelength Range on Nanoporous Gold Disks. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7FF3QRM

Publications:

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 Letters, 16(7), 4641–4647. doi:10.1021/acs.nanolett.6b01959

Purpose:

The purpose of this research was to improve the signal strength of spectroscopic methods to measure signals in the near-infrared range in hydrocarbon molecules using nanomaterials.

Data Parameters and Units:

Excel worksheet Figure 1 corresponds to Figure 1G in the associated publication: wavelength (nm), absorbance (350 nm) = extinction spectra absorbance of NPG disk array on glass in air with diameter of 350 nm, absorbance (600 nm) = extinction spectra absorbance of NPG disk array on glass in air with diameter of 600 nm. Excel worksheet Figure 2 corresponds to Figure 2b in the associated publication: wavelength (nm), water (extinction spectra of water), water and 350 nm (extinction spectra of water on NPG disks with a diameter of 350 nm), water and 600 nm (extinction spectra of water on NPG disks with a diameter of 600 nm). Excel worksheet Figure 3 corresponds to Figure 2c in the associated publication: wavelength (nm), extinction spectra of NPG disks with a diameter of 350 nm in solvent (water, salt water, ethanol, hexane, iso-octane, hexadecane, toluene). Excel worksheet Figure 4 corresponds to Figure 3a in the associated publication: wavelength (nm), ODT solution (absorption spectra of octadecanethiol), ODT SAM on 350 nm (absorption spectra of NPG disk arrays with a diameter of 350 nm functionalized with octadecanethiol self-assembled monolayer), ODT SAM on 600 nm (absorption spectra of NPG disk arrays with a diameter of 600 nm functionalized with octadecanethiol self-assembled monolayer). Excel worksheet Figure 5 corresponds to Figure 3b in the associated publication: wavelength (nm), 350 nm in air (extinction spectra of NPG disk arrays with a diameter of 350 nm in air at 1725 nm), 350 nm With ODT (extinction spectra of NPG disk arrays with a diameter of 350 nm functionalized with octadecanethiol self-assembled monolayer in air at 1725 nm). Excel worksheet Figure 6 corresponds to Figure 3c in the associated publication: wavelength (nm), 600 nm in air (extinction spectra of NPG disk arrays with a diameter of 600 nm in air at 2400 nm), 600 nm With ODT (extinction spectra of NPG disk arrays with a diameter of 600 nm functionalized with octadecanethiol self-assembled monolayer in air at 2400 nm). Excel worksheet Figure 7 corresponds to Figure 4a in the associated publication: wavelength (nm), Hex on 600 nm (surface-enhanced near-infrared absorption spectra of hexadecane on 600 nm NPG disk-glass substrate), Hex on 350 nm (surface-enhanced near-infrared absorption spectra of hexadecane on 350 nm NPG disk-glass substrate). Excel worksheet Figure 8 corresponds to Figure 4b in the associated publication: wavelength (nm), Dodecane on 600 nm (surface-enhanced near-infrared absorption spectra of dodecane on 600 nm NPG disk-glass substrate), Dodecane on 350 nm (surface-enhanced near-infrared absorption spectra of dodecane on 350 nm NPG disk-glass substrate). Excel worksheet Figure 9 corresponds to Figure 4c in the associated publication: wavelength (nm), Siloxane on 600 nm (surface-enhanced near-infrared absorption spectra of siloxane on 600 nm NPG disk-glass substrate), Siloxane on 350 nm (surface-enhanced near-infrared absorption spectra of siloxane on 350 nm NPG disk-glass substrate). Excel worksheet Figure 10 corresponds to Figure 5a in the associated publication: PMMA thickness (poly(methyl methacrylate) film thickness on NPG disk substrate (nm)), 350 nm NPGD (localized surface plasmon resonance (wavelength) shift (nm) with 350 nm NPG disks), 600 nm NPGD (localized surface plasmon resonance (wavelength) shift (nm) with 600 nm NPG disks). Excel worksheet Figure 11 corresponds to Figure 5b in the associated publication: wavelength (nm), PMMA on 600 nm (surface-enhanced near-infrared absorption spectra of 100 nm thick PMMA film at 1398 nm with 600 nm NPG disks), PMMA on 350 nm (surface-enhanced near-infrared absorption spectra of 100 nm thick PMMA film at 1398 nm with 350 nm NPG disks). Excel worksheet Figure 12 corresponds to Figure 5c in the associated publication: PMMA thickness (poly(methyl methacrylate) film thickness on NPG disk substrate (nm)), column b = normalized surface-enhanced near-infrared absorption spectra at 1398 nm intensity for NPG disk arrays with diameter of 350 nm, column c = normalized surface-enhanced near-infrared absorption spectra at 1398 nm intensity for NPG disk arrays with diameter of 600 nm. Excel worksheet Figure 13 corresponds to Figure 6a in the associated publication: wavelength (nm), Pyrene on 600 nm (surface-enhanced near-infrared absorption spectra of pyrene on 600 nm NPG disk substrate), Pyrene on 350 nm (surface-enhanced near-infrared absorption spectra of pyrene on 350 nm NPG disk substrate). Excel worksheet Figure 14 corresponds to Figure 6b in the associated publication: wavelength (nm), Crude oil on 600 nm (surface-enhanced near-infrared absorption spectra of crude oi on 600 nm NPG disk substrate), Crude oil on 350 nm (surface-enhanced near-infrared absorption spectra of crude oil on 350 nm NPG disk substrate)

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