What question did this study set out to answer?

The aim is to explore a new method of controlling the coffee ring effect through thermal gradients in confined droplets.

January 23, 2026Chemistry LettersOpen Access

Control of Coffee-Ring Formation by Vertical Thermal Gradients in Confined Droplets

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Study demonstrates a new approach to control coffee-ring formation in confined droplets, suggesting enhanced material processing methods.

The aim is to explore a new method of controlling the coffee ring effect through thermal gradients in confined droplets.
Demonstrated a technique utilizing vertical thermal gradients to influence coffee-ring formation.
Analyzed the impact of these gradients on evaporative processes in confined droplets.
Used various particle and solvent combinations to assess the effect on deposition patterns.
Successfully controlled coffee-ring formation through temperature manipulation.
Showed that this method does not compromise the physicochemical properties of materials.
Highlighted a versatile route that can enhance functional coating applications.

Takada et al. (2026) studied this question.

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