A thermally baffled device for highly stabilized convective PCR

Area of Science:

• Biotechnology
• Molecular Biology
• Thermal Engineering

Background:

• Rayleigh-Bénard convective Polymerase Chain Reaction (PCR) offers a simple DNA amplification method.
• Convective PCR is highly sensitive to environmental temperature fluctuations, limiting its practical applications, especially with small test tubes.
• Existing methods lack stability for field use.

Purpose of the Study:

• To improve the stability and reduce the sensitivity of convective PCR to environmental temperature fluctuations.
• To develop a modified convective PCR device suitable for field applications.
• To assess the performance of the modified device under challenging environmental conditions.

Main Methods:

• Modification of a Rayleigh-Bénard convective PCR device by incorporating thermal baffles.
• Testing the device's stability and performance under varying environmental temperatures, including a wind tunnel at 1 m/s.
• Evaluating the potential for low-cost, point-of-care application.

Main Results:

• The addition of thermal baffles significantly reduced the influence of environmental temperature fluctuations on the convective PCR process.
• The modified device demonstrated enhanced stability even in a 1 m/s wind tunnel.
• The instrument maintained performance despite external temperature variations.

Conclusions:

• The thermally baffled convective PCR instrument offers a stable and reliable method for DNA amplification.
• This modified device overcomes the limitations of traditional convective PCR, enhancing its applicability.
• The potential for a low-cost, field-deployable Polymerase Chain Reaction (PCR) instrument for molecular diagnostics is established.