Biogenic fluorescent carbon dots modulated fabrication of concatenate logic library and pattern-mediated molecular keypad lock for chemical sensing application

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2023-05, Vol.463, p.142354, Article 142354
• Main Authors: Manayil Parambil, Ajith, Nabeel Mattath, Mohamed, Rajamani, Paulraj, Pham, Phuong V., Kumar, Gopalakrishnan, Ponnusamy, Vinoth Kumar
• Format: Article
• Language: English
• Subjects: Boolean Functions; Carbon Dots; Keypad Locks; Molecular logic gates; Parity Checker
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2023.142354

[Display omitted] •Multi-stimuli responsive computation by functionalized C-dots platform.•Fabrication of a logic library that represents 15 fundamental logic gates.•Development of parity checker by using C-dots and AC-dots as the lead platforms.•PLE-based swiping pattern keypad lock by “On-Off-On” and “Off-On-Off” sensing. In recent years, molecular logic gates (MLGs) have gained much attention among researchers to replace conventional silicon-based electronic computers. MLGs are employed for various applications, including biological–chemical sensors, heavy metal ion detection, illness diagnosis, and therapy. In this work, we developed two different chemically functionalized forms of biogenic Carbon (C)-dots synthesized using F. religiose and applied as MLGs for multi-stimulus responsive computing. To mimic the operation of Boolean logic gates, we combined as-synthesized three different C-dot platforms (including bulk C-dots, thiol-functionalized (TC)-dots, and acid-functionalized (AC)-dots) with other analytes such as Fe3+, Hg2+, ascorbic acid (AA), glucose (Glu), dichlorvos (DV), and H2O2 and integrated to build a logic library that represents 15 fundamental logic gates (IMP, INH, NOT, NOR, YES, PASS0, and PASS1) and their combinational operations (IMP-OR, IMP-INH, INH-OR). Furthermore, we have developed a parity checker that distinguishes 0 to 9 natural integers as even or odd by using dual-source responsive C-dots and AC-dots platforms. Further, because of the lack of studies using C-dots in “On-Off-On” and “Off-On-Off” sensing to generate logic computation, we have developed a swiping pattern-mediated molecular keypad lock to promise the confidentiality, integrity, and availability of discrete information. A novel design idea for an advanced molecular keypad lock has been proposed based on the dynamic switching of C-dots photoluminescence emission (PLE) with 9 input keys and 6 input key combinations. The keypad lock can be potentially used in different fields, such as electronic gadgets, security systems, sensors, and therapeutics. This is an approach to replacing conventional silicon-based electronic systems with PLE-based nanoforms.