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Bae JH, Kim S, Ahn J, Shin C, Jung BK, Lee YM, Hong YK, Kim W, Ha DH, Ng TN, Kim J, Oh SJ. Acid-Base Reaction-Assisted Quantum Dot Patterning via Ligand Engineering and Photolithography. ACS Appl Mater Interfaces 2022; 14:47831-47840. [PMID: 36255043 DOI: 10.1021/acsami.2c10297] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The integration of quantum dots (QDs) into device arrays for high-resolution display and imaging sensor systems remains a significant challenge in research and industry because of issues associated with the QD patterning process. It is difficult for conventional patterning processes such as stamping, inkjet printing, and photolithography to employ QDs and fabricate high-resolution patterns without degrading the properties of QDs. Here, we introduce a novel strategy for the QD patterning process by treating QDs with a bifunctional ligand for acid-base reaction-assisted photolithography. Bifunctional ligands, such as MPA (mercaptopropionic acid) or TGA (thioglycolic acid), have a carboxyl group on one side that allows the QDs to be etched along with the photoresist (PR) by the base developer, while on the opposite side the ligands have a thiol group that passivates the QD surface. Passivating MPA ligands on QDs facilitates patterning of QD films and makes them compatible with harsh photolithography processes. We successfully achieved the patterning of QDs down to 5 μm. We also fabricated high-resolution patterned QD light-emitting diodes (LEDs) and QD photodetector arrays. Our patterning process provides precise control for the fabrication of highly integrated QD-based optoelectronic devices.
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Affiliation(s)
- Jung Ho Bae
- Department of Materials Science and Engineering, Korea University, Seoul02841, Republic of Korea
| | - Suhyeon Kim
- Department of Advanced Materials Engineering, Kyonggi University, Suwon-si, Gyeonggi-do16227, Republic of Korea
| | - Junhyuk Ahn
- Department of Materials Science and Engineering, Korea University, Seoul02841, Republic of Korea
| | - Chanho Shin
- Materials Science Engineering Program and Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, California92093,United States
| | - Byung Ku Jung
- Department of Materials Science and Engineering, Korea University, Seoul02841, Republic of Korea
| | - Yong Min Lee
- Department of Semiconductor Systems Engineering, Korea University, Seoul02841, Republic of Korea
| | - Yun Kun Hong
- School of Integrative Engineering, Chung-Ang University, Seoul06974, Republic of Korea
| | - Woosik Kim
- Department of Materials Science and Engineering, Korea University, Seoul02841, Republic of Korea
| | - Don Hyung Ha
- School of Integrative Engineering, Chung-Ang University, Seoul06974, Republic of Korea
| | - Tse Nga Ng
- Materials Science Engineering Program and Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, California92093,United States
| | - Jiwan Kim
- Department of Advanced Materials Engineering, Kyonggi University, Suwon-si, Gyeonggi-do16227, Republic of Korea
| | - Soong Ju Oh
- Department of Materials Science and Engineering, Korea University, Seoul02841, Republic of Korea
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Jeong HJ, Park C, Jeon H, Lee KN, Lee J, Lim SC, Namkoong G, Jeong MS. Quasi-2D Halide Perovskite Memory Device Formed by Acid-Base Binary Ligand Solution Composed of Oleylamine and Oleic Acid. ACS Appl Mater Interfaces 2021; 13:40891-40900. [PMID: 34470107 DOI: 10.1021/acsami.1c09725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Organometal halide perovskite materials are receiving significant attention for the fabrication of resistive-switching memory devices based on their high stability, low power consumption, rapid switching, and high ON/OFF ratios. In this study, we synthesized 3D FAPbBr3 and quasi-2D (RNH3)2(FA)1Pb2Br7 films using an acid-base binary ligand solution composed of oleylamine (OlAm) and oleic acid in toluene. The quasi-2D (RNH3)2(FA)1Pb2Br7 films were synthesized by controlling the protonated OlAm (RNH3+) solution concentration to replace FA+ cations with large organic RNH3+ cations from 3D FAPbBr3 perovskites. The quasi-2D (RNH3)2(FA)1Pb2Br7 devices exhibited nonvolatile write-once read-many (WORM) memory characteristics, whereas the 3D FAPbBr3 only exhibited hysteresis behavior. Analysis of the 3D FAPbBr3 device indicated operation in the trap-limited space-charge-limited current region. In contrast, quasi-2D (RNH3)2(FA)1Pb2Br7 devices provide low trap density that is completely filled by injected charge carriers and then subsequently form conductive filaments (CFs) to operate as WORM devices. Nanoscale morphology analysis and an associated current mapping study based on conductive atomic force microscopy measurements revealed that perovskite grain boundaries serve as major channels for high current, which may be correlated with the conductive low-resistive-switching behavior and formation of CFs in WORM devices.
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Affiliation(s)
- Hyeon Jun Jeong
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Chulho Park
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hobeom Jeon
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kang-Nyeoung Lee
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Juchan Lee
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seong Chu Lim
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Gon Namkoong
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Electrical and Computer Engineering, Old Dominion University, Applied Research Centre, 12050 Jefferson Avenue, Newport News, Virginia 23606, United States
| | - Mun Seok Jeong
- Department of Physics and Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
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Sun Y, Huang H, Vardhan H, Aguila B, Zhong C, Perman JA, Al-Enizi AM, Nafady A, Ma S. Facile Approach to Graft Ionic Liquid into MOF for Improving the Efficiency of CO 2 Chemical Fixation. ACS Appl Mater Interfaces 2018; 10:27124-27130. [PMID: 30016060 DOI: 10.1021/acsami.8b08914] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This work describes a facile approach to modify metal-organic frameworks (MOFs) with ionic liquids (ILs), rendering them as useful heterogeneous catalysts for CO2 chemical fixation. An amino-functionalized imidazolium-based ionic liquid is firmly grafted into the porous MOF, MIL-101-SO3H by the acid-base attraction between positively charged ammonium groups on the IL and negatively charged sulfonate groups from the MOF. Analyses by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, 1H NMR, and N2 sorption experiments reveal the MOF-supported ionic liquid (denoted as IL@MOF) material remains intact while functioning as a recyclable heterogeneous catalyst that can efficiently convert CO2 and epichlorohydrin into chloropropene carbonate without the addition of a cocatalyst.
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Affiliation(s)
- Yuxiu Sun
- State Key Laboratory of Separation Membranes and Membrane Processes , Tianjin Polytechnic University , 399 Binshui West Road , Tianjin 300387 , China
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Hongliang Huang
- State Key Laboratory of Separation Membranes and Membrane Processes , Tianjin Polytechnic University , 399 Binshui West Road , Tianjin 300387 , China
| | - Harsh Vardhan
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Briana Aguila
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Chongli Zhong
- State Key Laboratory of Separation Membranes and Membrane Processes , Tianjin Polytechnic University , 399 Binshui West Road , Tianjin 300387 , China
| | - Jason A Perman
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Abdullah M Al-Enizi
- Chemistry Department, College of Science , King Saud University , Riyadh 11451 , Saudi Arabia
| | - Ayman Nafady
- Chemistry Department, College of Science , King Saud University , Riyadh 11451 , Saudi Arabia
- Chemistry Department, Faculty of Science , Sohag University , Sohag 82524 , Egypt
| | - Shengqian Ma
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
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Abstract
We use ab initio molecular dynamics to study proton transfer in a donor-bridge-acceptor system in which the bridge is a single water molecule and the entire system is embedded in aqueous solution. The results, based on a large number of proton transfer trajectories, demonstrate that the dominant charge-transfer pathway is a subpicosecond "through bridge" event in which the bridge adopts an Eigen-like (hydronium) structure. We also identify another state in which the bridge forms a Zundel-like configuration with the acceptor that appears to be a dead end for the charge transfer. The reaction coordinate is inherently multidimensional and, as we demonstrate, cannot be given in terms of either local structural parameters of the donor-bridge-acceptor system or local solvent coordination numbers.
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Affiliation(s)
- Ugo Rivard
- †Département de Chimie, Université de Montréal, CP 6128, succursale Centre-Ville, Montréal H3C3J7, Canada
| | - Vibin Thomas
- †Département de Chimie, Université de Montréal, CP 6128, succursale Centre-Ville, Montréal H3C3J7, Canada
| | - Andrew Bruhacs
- ‡Departments of Chemistry and Physics, Center for the Physics of Materials, McGill University, 801 Sherbrooke Street West, Montréal H3A2K6, Canada
| | - Bradley Siwick
- ‡Departments of Chemistry and Physics, Center for the Physics of Materials, McGill University, 801 Sherbrooke Street West, Montréal H3A2K6, Canada
| | - Radu Iftimie
- †Département de Chimie, Université de Montréal, CP 6128, succursale Centre-Ville, Montréal H3C3J7, Canada
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