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Agashe C, Saroha A, Agasti SS, Patra D. Supramolecular Modulation of Fluid Flow in a Self-Powered Enzyme Micropump. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6933-6939. [PMID: 38497757 DOI: 10.1021/acs.langmuir.3c03958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Regulating macroscopic fluid flow by catalytic harnessing of chemical energy could potentially provide a solution for powerless microfluidic devices. Earlier reports have shown that surface-anchored enzymes can actuate the surrounding fluid in the presence of the respective substrate in a concentration-dependent manner. It is also crucial to have control over the flow speed of a self-powered enzyme micropump in various applications where controlled dosing and mixing are required. However, modulating the flow speed independent of the fuel concentration remains a significant challenge. In a quest to regulate the fluid flow in such a system, a supramolecular approach has been adopted, where reversible regulation of enzyme activity was achieved by a two-faced synthetic receptor bearing sulfonamide and adamantane groups. The bovine carbonic anhydrase (BCA) enzyme containing a single binding site favorable to the sulfonamide group was used as a model enzyme, and the enzyme activity was inhibited in the presence of the two-faced inhibitor. The same effect was reflected when the immobilized enzyme was used as an engine to actuate the fluid flow. The flow velocity was reduced up to 53% in the presence of 100 μM inhibitor. Later, upon addition of a supramolecular "host" CB[7], the inhibitor was sequestered from the enzyme due to the higher binding affinity of CB[7] with the adamantane functionality of the inhibitor. As a result, the flow velocity was restored to ∼72%, thus providing successful supramolecular control over a self-powered enzyme micropump.
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Affiliation(s)
- Chinmayee Agashe
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
| | - Akshay Saroha
- Jawaharlal Nehru Centre for Advanced Scientific Research, Rachenahalli Lake Rd, Jakkur, Bengaluru 560064, Karnataka, India
| | - Sarit S Agasti
- Jawaharlal Nehru Centre for Advanced Scientific Research, Rachenahalli Lake Rd, Jakkur, Bengaluru 560064, Karnataka, India
| | - Debabrata Patra
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
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Alam M, Sangwan R, Agashe C, Gill AK, Patra D. Autonomous macroscopic signal deciphering the geometric self-sorting of pillar[ n]arenes. Chem Commun (Camb) 2023; 59:6016-6019. [PMID: 37128696 DOI: 10.1039/d3cc01372c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In this communication, we have deciphered the geometric self-sorting of pillar[n]arenes by analyzing the fluid flow pattern obtained during the self-assembly of complementary pillar[n]arenes on the surface. The concept was further extended to demonstrate flow manipulation inside a microchannel where multiple sites were available for self-sorting, and the resultant flow velocity was tuned by the feeding ratio of the complementary pairs.
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Affiliation(s)
- Mujeeb Alam
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Rekha Sangwan
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Chinmayee Agashe
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Arshdeep Kaur Gill
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Debabrata Patra
- Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
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Alam M, Agashe C, Gill AK, Varshney R, Tiwari N, Patra D. Discrimination of enantiomers and constitutional isomers by self-generated macroscopic fluid flow. Chem Commun (Camb) 2023; 59:434-437. [PMID: 36515131 DOI: 10.1039/d2cc05545g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The amplification of weak molecular signals to visible output could provide a gateway to the macroscopic world. In this context, supramolecular interfaces were designed by depositing macrocyclic "host" molecules in a multilayer film that can be utilized to discriminate isomers by their fluid flow response upon "host-guest" molecular recognition.
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Affiliation(s)
- Mujeeb Alam
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Chinmayee Agashe
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Arshdeep Kaur Gill
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Rohit Varshney
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
| | - Naveen Tiwari
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Uttar Pradesh, 208016, India
| | - Debabrata Patra
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab, 140306, India.
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