Versatile logic devices based on programmable DNA-regulated silver-nanocluster signal transducers

Area of Science:

• Nanotechnology
• Biomolecular Engineering
• Molecular Diagnostics

Background:

• Silver nanoclusters (AgNCs) exhibit tunable fluorescence properties.
• DNA nanotechnology offers precise control over molecular assembly and function.
• Developing robust and versatile biomolecular logic systems is an ongoing challenge.

Purpose of the Study:

• To report a DNA-encoding strategy for programmable regulation of AgNC fluorescence.
• To demonstrate the construction of various DNA-based logic gates using AgNCs as signal transducers.
• To fabricate a novel biomolecular keypad for constructing crossword puzzles.

Main Methods:

• Utilizing a DNA-encoding strategy to functionalize AgNCs.
• Employing AgNCs as fluorescence signal transducers for DNA inputs.
• Designing and implementing DNA-based logic gates (AND, OR, INHIBIT, XOR, NOR, XNOR, NAND, sequential).
• Fabricating a biomolecular keypad for crossword puzzle construction.

Main Results:

• Programmable regulation of AgNC fluorescence properties achieved through DNA encoding.
• Successful construction of multiple DNA-based logic gates with high fidelity.
• Demonstration of a functional biomolecular keypad for complex pattern generation.
• AgNC-based logic systems exhibited a simple transducer-introduction strategy, universal design, and biocompatible operation.

Conclusions:

• The DNA-encoding strategy provides a versatile platform for controlling AgNC fluorescence.
• AgNCs serve as effective signal transducers for building complex DNA-based logic systems.
• This work introduces a new generation of signal transducer materials and a general route to biomolecular logic devices for practical applications.