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Kumar A, Kumari N, Dubbu S, Kumar S, Kwon T, Koo JH, Lim J, Kim I, Cho Y, Rho J, Lee IS. Nanocatalosomes as Plasmonic Bilayer Shells with Interlayer Catalytic Nanospaces for Solar‐Light‐Induced Reactions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Amit Kumar
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Nitee Kumari
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Sateesh Dubbu
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Sumit Kumar
- Center for Soft and Living MatterInstitute for Basic Science (IBS) and Department of Biomedical EngineeringSchool of Life Sciences Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 South Korea
| | - Taewan Kwon
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Jung Hun Koo
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Jongwon Lim
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Inki Kim
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - Yoon‐Kyoung Cho
- Center for Soft and Living MatterInstitute for Basic Science (IBS) and Department of Biomedical EngineeringSchool of Life Sciences Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 South Korea
| | - Junsuk Rho
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
- Department of Chemical EngineeringPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
| | - In Su Lee
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 South Korea
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Kumar A, Kumari N, Dubbu S, Kumar S, Kwon T, Koo JH, Lim J, Kim I, Cho YK, Rho J, Lee IS. Nanocatalosomes as Plasmonic Bilayer Shells with Interlayer Catalytic Nanospaces for Solar-Light-Induced Reactions. Angew Chem Int Ed Engl 2020; 59:9460-9469. [PMID: 32237185 DOI: 10.1002/anie.202001531] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Indexed: 12/19/2022]
Abstract
Interest and challenges remain in designing and synthesizing catalysts with nature-like complexity at few-nm scale to harness unprecedented functionalities by using sustainable solar light. We introduce "nanocatalosomes"-a bio-inspired bilayer-vesicular design of nanoreactor with metallic bilayer shell-in-shell structure, having numerous controllable confined cavities within few-nm interlayer space, customizable with different noble metals. The intershell-confined plasmonically coupled hot-nanospaces within the few-nm cavities play a pivotal role in harnessing catalytic effects for various organic transformations, as demonstrated by "acceptorless dehydrogenation", "Suzuki-Miyaura cross-coupling" and "alkynyl annulation" affording clean conversions and turnover frequencies (TOFs) at least one order of magnitude higher than state-of-the-art Au-nanorod-based plasmonic catalysts. This work paves the way towards next-generation nanoreactors for chemical transformations with solar energy.
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Affiliation(s)
- Amit Kumar
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Nitee Kumari
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Sateesh Dubbu
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Sumit Kumar
- Center for Soft and Living Matter, Institute for Basic Science (IBS) and Department of Biomedical Engineering, School of Life Sciences Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Taewan Kwon
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Jung Hun Koo
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Jongwon Lim
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Inki Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Yoon-Kyoung Cho
- Center for Soft and Living Matter, Institute for Basic Science (IBS) and Department of Biomedical Engineering, School of Life Sciences Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Junsuk Rho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.,Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - In Su Lee
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
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Fukuyama M, Hibara A, Yoshida Y, Maeda K. Kinetic Switching of the Concentration/Separation Behavior of Microdroplets. Anal Chem 2017; 89:9279-9283. [PMID: 28745495 DOI: 10.1021/acs.analchem.7b02062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work demonstrates that the solute concentration inside 100 micrometer-sized aqueous microdroplets can be controlled by adjusting the time required for the aqueous nanometer-sized droplets (nanodroplet) or reverse micelles to pass over the surface of the microdroplet. The kinetics of molecular transport between the microdroplets and the nanodroplets was investigated by utilizing a microdroplet array, and on the basis of these results, a control over the concentration selectivity of the contents of the microdroplet was achieved. This method is operationally simple and can be potentially applied as a pretreatment method for microanalytical systems that require high-density microdroplet arrays. This method can also be utilized for parallel small sample analyses such as single cell analysis.
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Affiliation(s)
- Mao Fukuyama
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology , 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.,PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Akihide Hibara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku Univesity , 2-1-1 Katahira, Aoba-ku Sendai 980-8577, Japan
| | - Yumi Yoshida
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology , 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kohji Maeda
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology , 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Ahn MM, Im DJ, Kim JG, Lee DW, Kang IS. Extraction of Cations from an Ionic Liquid Droplet in a Dielectric Liquid under Electric Field. J Phys Chem Lett 2014; 5:3021-3025. [PMID: 26278254 DOI: 10.1021/jz501511z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ionic liquids show great promise as excellent solvents or catalysts in energy and biological fields due to their unique chemical and physical properties. In this work, the characteristics of various ionic liquids are investigated with the electrophoresis of a charged droplet (ECD) method. Under normal situation, a charged droplet in a dielectric liquid shows back-and-forth bouncing motion between the positive and negative electrodes continuously. However, for some special ionic liquids, interesting retreating behavior of a charged droplet has been observed. This retreating behavior is due to the loss of positive charges of the droplet, and it suggests that only the positive ions are extracted from the droplet under the applied electric field. Based on this hypothesis of ion extraction, Fourier transform infrared (FTIR) spectroscopy analysis has been performed. The retreating behavior is also discussed from the intermolecular point of view according to the ion species.
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Affiliation(s)
| | - Do Jin Im
- ‡Department of Chemical Engineering, Pukyong National University, 365 Sinseon-ro, Nam-Gu, Busan, 608-737, South Korea
| | | | - Dong Woog Lee
- ∥KEPCO Research institute, 105 Moonji-Ro, Yusung-Gu, Daejeon, 305-760, South Korea
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Deng NN, Wang W, Ju XJ, Xie R, Weitz DA, Chu LY. Wetting-induced formation of controllable monodisperse multiple emulsions in microfluidics. LAB ON A CHIP 2013; 13:4047-4052. [PMID: 23948718 DOI: 10.1039/c3lc50638j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Multiple emulsions, which are widely applied in a myriad of fields because of their unique ability to encapsulate and protect active ingredients, are typically produced by sequential drop-formations and drop-encapsulations using shear-induced emulsification. Here we report a qualitatively novel method of creating highly controlled multiple emulsions from lower-order emulsions. By carefully controlling the interfacial energies, we adjust the spreading coefficients between different phases to cause drops of one fluid to completely engulf other drops of immiscible fluids; as a result multiple emulsions are directly formed by simply putting preformed lower-order emulsion drops together. Our approach has highly controllable flexibility. We demonstrate this in preparation of both double and triple emulsions with a controlled number of inner drops and precisely adjusted shell thicknesses including ultra-thin shells. Moreover, this controllable drop-engulfing-drop approach has a high potential in further investigations and applications of microfluidics. Importantly, this innovative approach opens a window to exploit new phenomena occurring in fluids at the microscale level, which is of great significance for developing novel microfluidics.
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Affiliation(s)
- Nan-Nan Deng
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
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Lee DW, Im DJ, Kang IS. Electric double layer at the interface of ionic liquid-dielectric liquid under electric field. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1875-84. [PMID: 23331068 DOI: 10.1021/la3040775] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The structure of the electric double layer (EDL) is analyzed in order to understand the electromechanical behavior of the interface of ionic liquid-dielectric liquid. The modified Poisson-Boltzmann equation proposed by Bazant et al. is solved to see the crowding and the overscreening effects that are the characteristics of an ionic liquid (Bazant, M. Z.; Storey, B. D.; Kornyshev, A. A. Double layer in ionic liquids: Overscreening versus crowding. Phys. Rev. Lett. 2011, 106, 046102.). From the simple one-dimensional (1-D) analysis, it is found that the changes of the composition and the material properties in the EDL are negligible except under some extreme conditions such as strong electric field over O(10(8)) V/m. From the electromechanical view points, an ionic liquid behaves like a pure conductor at the interface with a dielectric liquid. Based on these findings, three specific application problems are considered. In the first, a new method is suggested for measuring the interfacial tension of an ionic liquid-dielectric liquid system. The deformation of a charged ionic liquid droplet translating between two electrodes is used for this measurement. The second is for the Taylor cone problem, which includes an extreme electric field condition near the tip. The size of the critical region, where the EDL effect should be considered, is estimated by using the 1-D analysis result. Numerical computation is also performed to see the profiles of electric potential and the electric stress along the interface of the Taylor cone. Lastly, the electrowetting problem of the ionic liquid is considered. The discrepancies in the results of previous workers are interpreted by using the results of the present work. It is shown that all the results might be consistent if the leaking of the dielectric layer and/or the adsorption of ions is considered.
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Affiliation(s)
- D W Lee
- Department of Chemical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
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Kovarik ML, Ornoff DM, Melvin AT, Dobes NC, Wang Y, Dickinson AJ, Gach PC, Shah PK, Allbritton NL. Micro total analysis systems: fundamental advances and applications in the laboratory, clinic, and field. Anal Chem 2013; 85:451-72. [PMID: 23140554 PMCID: PMC3546124 DOI: 10.1021/ac3031543] [Citation(s) in RCA: 170] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Michelle L. Kovarik
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Douglas M. Ornoff
- Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Adam T. Melvin
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Nicholas C. Dobes
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Yuli Wang
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Alexandra J. Dickinson
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Philip C. Gach
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Pavak K. Shah
- Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599 and North Carolina State University, Raleigh, NC 27695
| | - Nancy L. Allbritton
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
- Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina 27599
- Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599 and North Carolina State University, Raleigh, NC 27695
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