Indian Institute of Technology Madras

Panikkanvalappil Ravindranathan Sajanlal

Pradeep Thalappil

Thalappil Pradeep

Ammu Mathew

Composite materials comprising a mesoflower structure, methods of preparing the composite material, and methods of detecting heavy metal ion using the composite material are described herein. In some embodiments, a silica-coated gold mesoflower with a layer of silver quantum clusters may be capable of detecting Hgions in a sample at zeptomolar concentrations.

Visual detection of mercury ions

An embodiment relates to a man-made object comprising a distinctive structure with a feature to identify the object, wherein the object has a size such that the object is observable under visible light, wherein the feature is embedded in or on the object and a size of the feature is such that the feature is not observable under visible light, wherein the feature comprises an attribute originating from the feature, and wherein the attribute defines the feature.

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Kerala, India

Panikkanvalappil Ravindranathan Sajanlal