Analytical Technologies Singapore

Applications

Showing the various applications of the instruments provided.

Fluorescence Spectroscopy w A-TEEM for fast & precise wine authentication

​Wine is a multi-million dollar industry that is susceptible to fraud and the authentication of wines is an important aspect in the industry. Read more to find out how the team at University of Adelaide, South Australia uses fluorescence spectroscopy with A-TEEM, to achieve 100% accuracy in the classification of different wines according to its geographical origin.

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Water treatment using fluorescence spectroscopy & AI intelligence

Water treatment plants do not control the water quality of their source water. Rain events, temperature shifts and unique groundwater features create a lot of variability.

 
“For water quality, the cards they’re dealt is what they get,” he said. “It’s not like making oil and gas at an oil refinery, where they can control the raw materials. You have raw materials that you don’t have any control over.”

Temperature, turbidity, pH, alkalinity, hardness, and dissolved organic materials affect water quality. These variables come in different combinations and change over time. Treatment plants have to make treatment decisions on the back end and determine if they met multiple water quality targets that are chemistry driven.

The water sources are also changing due to climate.

“We get more intense rainstorms, so you get more turbidity (murkiness) coming in. You have different alkalinity now and the ability to manage these complexities is stressing the various plants’ technical capacities,” he said.

There are, however, chemicals and treatment processes operators can control, with multiple outputs and multiple objectives. Within limits, that is. For example, the objectives in the regulatory environment alone are increasing.

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Raman microscopy applied to Polymer characterisation

In the polymer field, Raman microscopy has become one of the most important characterization tools due to the large number of chemical and structural information which could be extracted from a single result. Thus, Raman microscopy can help from raw material characterization to genuine product
control, from synthesis process to defect investigation, covering the whole process of polymers manufacturing.

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Structural characterization of WS2 flakes by Photoluminescence and ultra-low frequency Raman spectroscopy on a unique multimode platform

2D materials are best characterised using both Photoluminescence (PL) & ultra-low frequency Raman spectroscopy. PL is most appropriate for band structures characterisation at the micron scale.  Additionally, Raman analysis very close to the laser line, allowing a precise characterisation of the number of layers of 2D materials as specific interlayer vibration modes are excited in the ultra-low spectral Raman range (< 50ms-1). Click below as we explore the application of the two techniques using one of the 2D materials, WS2 flakes. 

 
​By definition, photoluminescence is the most appropriate technique for band structures characterisation at the micron scale. Indeed, the luminescence band of a semiconductor informs directly about the bandgap energy. 

Furthermore, the Raman analysis very close to the laser line allows a precise characterisation of the number of layers of a 2D material. Indeed, specific interlayer vibration modes are excited in this spectral range. Being able to have both spectroscopy techniques, photoluminescence and ultra-low frequency Raman on the same instrument is a vital feature to characterise these materials as much as possible. 

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Ultrasonic Sprays onto balloon mounted catheters

Ultrasonic spray nozzles are advantageous in penetrating complex stent geometries, ensuring full coverage of all strut surfaces without webbing. The soft atomised spray adheres well to surfaces and coating morphology characteristics can be adjusted by modifying process parameters.

Pressure spray nozzles and air atomisers are not able to apply coatings as uniformly as ultrasonic coating systems. Coatings applied using ultrasonics are much thinner than can be achieved with dip coating, saving spray material while avoiding webbing. Since ultrasonic nozzles are non-clogging devices, spray quality is not compromised over time due to gradual clogging as seen in pressure nozzle processes.

​Advantages of Ultrasonic Spray for Stent Coatings:

  • Highly controllable and repeatable spray.
  • Non-clogging ultrasonic technology.
  • Ability to spray at flow rates in the microliter per hour range.
  • Droplet sizes as small as 9 microns (with organic solvents) with very tight drop distributions.
  • Low velocity spray adheres to stents without bounceback or overspray.
  • Proven process for coating implantable stents & other precision medical devices.
  • Highly durable coatings will not flake or peel.
  • Over a decade of experience coating with hundreds of systems in operation.

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