Spectroscopy Laboratory

The following facilities are now equipped in the laboratory:

This Raman spectrometer can be operated with one of the three excitation laser lines: HeNe laser (wavelength = 633 nm), and NeCd laser (wavelengths = 442 nm and 325 nm). This is a high-resolution system (~ 0.1 cm^-1) with edge filters that enable the detection of Stokes Raman scattering under a confocal optical microscope. These high-quality filter enable excellent laser line cut-off (~80cm^-1 from all laser lines), which is desirable for the detection of interesting Raman scattering including Radial Breathing Mode (RBM) of single wall carbon nanotubes (SWCNTs). This microscope has a high-precision x-y mapping stage with minimum steping of 100 nm. This sample stage in conjugate with a computer aided CCD camera allowed three dimensional (3D) sample mapping. This Raman system is also configurated for photoluminescence (PL) experiments with the UV HeCd excitation line. The detection range of the CCD sensor is between ~380–900 nm. In addition, this system is equiped with the Linkam cooling and heating stages and will enable Raman scattering to be caharcterized at desired ambient and temperatures between –196°C to 1500 °C (contact Professor Nina Orlovskaya and Professor Peter D. Moran from Materials Science and Engineering Department).

This FTIR system consists of a FT/IR-4200 spectrometer and an IRT-3000 FTIR microscope. IR spectra can be acquired macroscopically in the FT/IR-4200 spectrometer or microscopically under the microscope. The spectral range of the spectrometer is 7800 - 350 cm^-1 with step selectable resolutions of 16, 8, 4, 2, 1 and 0.5 cm^-1. A minimum signal- to-noise ratio of 30,000:1, RMS 120,000:1 can be expected. This spectrometer has a 90-degree Michelson interferometer utilizing retro-reflecting corner cube mirrors and a ceramic mid-infrared source with a 2-stage power supply. The microscope equipped with an automated X-Y-Z microscope stage with sample autofocus capability. It is connected to a mid band MCT detector with a spectral range of 5000 – 550 cm^-1. Its sample aperture is computer controlled and capable of infrared spectral measurements with a spatial resolution of 10 microns. This microscope is interfaced with a mapping software includes the ability to collect line and area maps. Spectral mapping data is processed and available as 3-D, contour, line and intensity mapping images.

This is a benchtop probing system for electrical measurement of microelectronic devices with wafer size up to 150 mm in diameter. This probe station has a fixed platen and features a Vacuum Glide stage. This stage provides non leadscrew-based free-form gross positioning of the wafer chuck. This system also has a video-ready, stereozoom microscope kit (Leica S6D) that allow device monitoring from the ccd camera-monitor system.

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Electrochemistry Laboratory

The glove box has a regenerative drying train (AtmosPure) that help to maintain the glove box atmospehere of < 5 ppm water and <1 ppm oxygen. The workstation is computer controlled with a Windows-based electrochemical instrument for performing measurements including various voltammetry, amperometry, chronopotentiometry, and potentiometry, etc.

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