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Vu TH, Yadav S, Tran CD, Nguyen HQ, Nguyen TH, Nguyen T, Nguyen TK, Fastier-Wooller JW, Dinh T, Phan HP, Ta HT, Nguyen NT, Dao DV, Dau VT. Charge-Reduced Particles via Self-Propelled Electrohydrodynamic Atomization for Drug Delivery Applications. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37318848 DOI: 10.1021/acsami.3c02000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Electrohydrodynamic atomization (EHDA) provides unparalleled control over the size and production rate of particles from solution. However, conventional methods produce highly charged particles that are not appropriate for inhalation drug delivery. We present a self-propelled EHDA system to address this challenge, a promising one-step platform for generating and delivering charge-reduced particles. Our approach uses a sharp electrode to produce ion wind, which reduces the cumulative charge in the particles and transports them to a target in front of the nozzle. We effectively controlled the morphologies of polymer products created from poly(vinylidene fluoride) (PVDF) at various concentrations. Our technique has also been proven safe for bioapplications, as evidenced by the delivery of PVDF particles onto breast cancer cells. The combination of simultaneous particle production and charge reduction, along with its direct delivery capability, makes the self-propelled EHDA a versatile technique for drug delivery applications.
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Affiliation(s)
- Trung-Hieu Vu
- School of Engineering and Built Environment, Griffith University, Gold Coast, QLD 4215, Australia
| | - Sharda Yadav
- Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
| | - Canh-Dung Tran
- School of Mechanical and Electrical Engineering, University of Southern Queensland, Toowoomba, QLD 4350, Australia
| | - Hong-Quan Nguyen
- School of Engineering and Built Environment, Griffith University, Gold Coast, QLD 4215, Australia
| | - Tuan-Hung Nguyen
- School of Engineering and Built Environment, Griffith University, Gold Coast, QLD 4215, Australia
| | - Thanh Nguyen
- School of Mechanical and Electrical Engineering, University of Southern Queensland, Toowoomba, QLD 4350, Australia
| | - Tuan-Khoa Nguyen
- Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
| | - Jarred W Fastier-Wooller
- School of Engineering and Built Environment, Griffith University, Gold Coast, QLD 4215, Australia
- School of Engineering, University of Tokyo, Tokyo 113-8656, Japan
| | - Toan Dinh
- School of Mechanical and Electrical Engineering, University of Southern Queensland, Toowoomba, QLD 4350, Australia
| | - Hoang-Phuong Phan
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Hang Thu Ta
- Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
- Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane, QLD 4067, Australia
- School of Environment and Science, Griffith University, Brisbane, QLD 4211, Australia
| | - Nam-Trung Nguyen
- Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
| | - Dzung Viet Dao
- School of Engineering and Built Environment, Griffith University, Gold Coast, QLD 4215, Australia
| | - Van Thanh Dau
- Centre for Catalysis and Clean Energy, Griffith University, Gold Coast, QLD 4215, Australia
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Jeong JH, Park K, Kim H, Park I, Choi J, Lee SS. Multiplexed electrospraying of water in cone-jet mode using a UV-embossed pyramidal micronozzle film. MICROSYSTEMS & NANOENGINEERING 2022; 8:110. [PMID: 36187890 PMCID: PMC9522652 DOI: 10.1038/s41378-022-00391-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 03/28/2022] [Accepted: 04/20/2022] [Indexed: 06/16/2023]
Abstract
The electrospraying of water in the cone-jet mode is difficult in practical applications owing to its low throughput and the electrical discharge caused by the high surface tension of water. A film with multiple dielectric micronozzles is essential for multiplexed electrospraying of water in cone-jet mode without electrical discharge. Thus, a pyramidal micronozzle film with five nozzles was fabricated using the UV-embossing process. The pyramidal micronozzle film consisted of pyramidal micronozzles, a micropillar array, and an in-plane extractor, which were proposed to minimize wetting and concentrate the electric field to the water meniscus at the tip of the pyramidal micronozzle. The electrospraying of water using a single pyramidal micronozzle was visualized by a high-speed camera at a flow rate of 0.15-0.50 ml/h with voltages of 0.0-2.3 kV, -1.6 kV, and -4.0 kV at the water, guide ring, and collector, respectively. Three distinct modes, the dripping, spindle, and cone-jet modes, were observed and distinguished according to the motion of the water meniscus at the nozzle tip. The steady Taylor cone and jet were observed in a voltage range of 1.3-2.0 kV in water, particularly in cone-jet mode. Multiplexed electrospraying of water in cone-jet mode at a flow rate of 1.5 ml/h was performed using a pyramidal micronozzle film, demonstrating the potential for a high-throughput electrospraying system.
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Affiliation(s)
- Ji-hun Jeong
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141 Republic of Korea
| | - Kwangseok Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141 Republic of Korea
| | - Hyoungsoo Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141 Republic of Korea
| | - Inyong Park
- Department of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon, 34103 Republic of Korea
| | - Jinyoung Choi
- Department of Mechanical Engineering, Dongshin University, Naju, 58245 Republic of Korea
| | - Seung S. Lee
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141 Republic of Korea
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Shin SS, Kim JH, Jeong H, Park MY, Yoon KJ, Son JW, Choi M, Kim H. Vapor-Mediated Infiltration of Nanocatalysts for Low-Temperature Solid Oxide Fuel Cells Using Electrosprayed Dendrites. NANO LETTERS 2021; 21:10186-10192. [PMID: 34793177 DOI: 10.1021/acs.nanolett.1c02872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Electrode architecturing for fast electrochemical reaction is essential for achieving high-performance of low-temperature solid oxide fuel cells (LT-SOFCs). However, the conventional droplet infiltration technique still has limitations in terms of the applicability and scalability of nanocatalyst implementation. Here, we develop a novel two-step precursor infiltration process and fabricate high-performance LT-SOFCs with homogeneous and robust nanocatalysts. This novel infiltration process is designed based on the principle of a reversible sol-gel transition where the gelated precursor dendrites are uniformly deposited onto the electrode via controlled nanoscale electrospraying process then resolubilized and infiltrated into the porous electrode structure through subsequent humidity control. Our infiltration technique reduces the cathodic polarization resistance by 18% compared to conventional processes, thereby achieving an enhanced peak power density of 0.976 W cm-2 at 650 °C. These results, which provide various degrees of freedom for forming nanocatalysts, exhibit an advancement in LT-SOFC technology.
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Affiliation(s)
- Sung Soo Shin
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
- Global Frontier Center for Multiscale Energy Systems, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
- Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Jeong Hun Kim
- Emerging Materials Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Hyeseong Jeong
- Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Mi Young Park
- Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Kyung Joong Yoon
- Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Ji-Won Son
- Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
- Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL), Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Mansoo Choi
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
- Global Frontier Center for Multiscale Energy Systems, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Hyoungchul Kim
- Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
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