![]() However, the mobility of DNA self‐assembled nanorobots is still dramatically limited due to challenges with designing and controlling nanoscale systems with many degrees of freedom. Significant progress in DNA nanotechnology has accelerated the development of molecular machines with functions like macroscale machines. Both the volume and pH value could be controlled, which proved the potential application of our proposed method in analytical chemistry, precision engineering, etc. In addition, to validate that this method is also suitable in the acid and alkaline solutions, 0.001 mol/L NaOH and H2SO4 solutions were respectively operated using the same procedure. In our experiments, a droplet (5% sodium chloride solution, 1.4 uL, pH = 7) could consume 98.9% of its initial volume and form a new droplet with a volume of 0.016 µL and pH of 12.2. To get a micro-droplet with desirable volume and pH values, three models, the relationship between the droplet’s volume and its diameter when the droplet was placed on a fluorinated ethylene propylene (FEP)–covered glass substrate, the relationship between the distance of the two electrodes and the size of the resulted micro-droplet, and the relationship between the pH value and the micro-droplet’s consuming rate, were built through the least square method. A pair of platinum electrodes fixed onto the jaws of a vernier caliper was used to modify the micro-droplet’s volume and adjust its pH value by simply adjusting the distance between the two electrodes. In this paper, a strategy to modify each micro-droplet’s volume and synchronously adjust its pH value as required based on the electrolysis reaction in silicone oil is demonstrated.
0 Comments
Leave a Reply. |