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Micro Raman Spectroscopy

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We provide plasmonic nanostructes chip fabricated by a negative-tone hydrogen silsesquioxane (HSQ) resist using electron-beam lithography (EBL). Our nanostructures are metallic nanostructures with very small gaps that can down to 20nm. Together with template stripping method, our nanostructures have ultra-smooth metal surfaces that will reduce plasmon scattering loss. This fabrication process of plasmonic nanostructure chip can be scaled up to reusable silicon wafer scale.

These plasmonic nanostructures chip can have various structural colours which is depend on the metallic materials used (gold, silver, aluminium are most common used), and gap size (< 100 nm). The unique structural colorization is resulted from plasmon resonant interactions between light and metallic nanostructures.

The fascination of our plasmonic nanostructures chip is it has strong light absorption although its structure is smaller than diffraction limit of light. This strong-light interaction occurs even in optically thin layers. By carefully tuning the nanostructures, we can make the plasmonic nanostructures chip that selectively interact with specific wavelength (colour). The nanogaps also have very strong optical field enhancement factor which is ideal for surface enhance Raman spectroscopy. The plasmonic nanostructures chip works seamlessly with our uRaman series for SERS study. Other applications include second-harmonic generation, photoluminescence enhancement and reflective tunable color surface.


Specification

  • sample area: 18μm X 18μm
  • Substrate: Gold
  • Feature size: Sub 20μm
  • Pitch size:100nm to 900nm
  • Customized pattern geometry

Application

  • Surface-enhanced Raman Scattering
  • Second-harmonic generation
  • Photoluminescence enhancement
  • Reflective turnable color surface

The SERS chip’s active area is formed using an ultra-short pulse laser on a soda-lime glass substrate. The SERS chip substrate material is a weak Raman scattered and therefore particularly suitable for SERS application (as compared to most crystalline materials). Therefore, our SERS chip will give very strong Raman signal on the probe molecule with low background signal from the substrate itself.

The SERS chips are made from patented techniques where the resulting surface structure features a stochastic nanopattern with features from few nanometers to almost a micron in size. These features have very good resonance characteristics for various excitation wavelengths and adsorbed analyte molecules. Analyte molecules, attached in the proximity of a certain combination of nano-features may experience the so called ‘hot spot’ effect, which leads to extremely high enhancement of Raman scattering. A single SERS chip can be used for various experimental conditions, different analytes and results in a very high relative enhancement ratio of the Raman scattering up to 106.

All SERS chips are vacuum packed in cleanroom environment with no glue or other chemical substances added, eliminating the risk of contamination.


Substrate Silver Gold
Excitation wavelength Blue to Infrared Red to Near Infrared
Active Area 4mm by 4mm
Overall Size 25mm by 25mm by 1mm

Technospex offer various highly integrated motorized XY microscope stages for precise positional control of the spot and mapping measurement. All our motorized stages have inbuilt measuring system and simple coaxial drive control which offers 1um or better repeatability with quiet operation. These motorized stages can be used for a wide range of sample holders; specimens and samples in many types of microscopy or imaging techniques and applications.

These motorized stages are computer controlled and integrated with our uSoft program. With the control via uSoft, users can easily position their sample down to 50nm step size for our uRaman or uSight modules. These motorized stages are ideal for automatically positioning a wide range of samples for Raman mapping or multiple point spectral measurement up to 75mm x 50mm is possible.


Key Features

  • Compact, Integrated controller
  • Integrated linear measurement systems for highest accuracy
  • Operation via integrated coaxial drive with 2 speed ranges for coarse positioning or fine adjustment
  • Coaxial drive adjustable in height and friction for ergonomical handling
  • Single Cable Solution: Communication between stage and controller plus electricity supply, all in one single, flexible cable
  • One-hand operation: Slide can be inserted into object holder one hand only

Specification

Travel Range Max. 76 X 52mm (3" X 2")
Travel Speed Max. 120 mm/s
Repeatability <1μm (bi-directional, measured according to VDI/DGQ 3441)
Accuracy +/-3μm(measured according to VDI/DGQ 3441)
Resolution >0.05μm (smallest step size)
Orthogonality <10 arc sec
Motor 2 phase stepper motor
Drive X-axis: bowden cable, Y-axis: rack-pinion/td>
Limit switches Integrated Hall sensors
Interface USB
Material / Surface Aluminium/anodic coating, black laquered
Worktop CERASIST® coated
Weight Approx. 2.9kg

Where measurement of liquid is required, Technospex offers original design cuvette holder enables user to perform liquid measurement with standard cuvette. Our cuvette holder is compact, modular design and can direct-attach to the microscope objective nose piece which integrate seamlessly with our uRaman and uSight series. Once attached, there is no further alignment is required. The new cuvette holder is low cost and ingenious accessory that empower micro-Raman microscope system to perform Raman measurement of the liquid sample in a standard cuvette, i.e. 45 (H) × 12.5 (W) × 12.5(H) mm cuvette.

Inside the new cuvette holder design, we use a macro-lens to focus the laser into the cuvette to maximize signal collection and throughput over the 1 cm pathlength cuvettes. This enable signal from a large collection volume and more representative Raman signal. It is a much have multipurpose cuvette holder for uv-vis, fluorescence and Raman measurement for liquid measurement.


Universal style CE certified Laser Safety Goggles: featuring a large frame that can be worn comfortably over prescription glasses, and equipped with side shields and solid top shields to protect the user’s eyes from laser radiation while maintaining peripheral vision. The frame arm length can be adjusted to suit different temple size, and the Laser safety ratings are printed onto the lenses for easy reference.


  • Light weight and comfortable
  • Size 144mm x 145mm x 50mm
  • Carrying case included

uG532_785 Specification

Suitable for 532nm and 785nm Lasers, CE rating of at least DLB5.

Amber colur with 32% visiblity.

Display Wavelength(nm) OD
190-532 6+
785-830 5+
800-815 6+

uG633_785 Specification

Suitable for 633nm and 785nm Lasers, CE rating of at least DR LB4.

Blue colour with 12% visiblity.

Display Wavelength(nm) OD
190-400 5+
625-850 5+
662-835 6+

uG785 Specification

Suitable for 785nm Lasers, CE rating of D LB6 + IM LB7 + R LB5.

Pink colour with 33% visiblity.

Display Wavelength(nm) OD
190-400 6+
720-810 7+
>810-830 5+
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+82-70-4420-8818
+82-10-5244-4360