1
|
Li Q, Cheng H, Xing C, Guo S, Wu X, Zhang L, Zhang D, Liu X, Wen X, Lü X, Zhang H, Quan Z. Pressure-Induced Amorphization and Crystallization of Heterophase Pd Nanostructures. Small 2022; 18:e2106396. [PMID: 35344277 DOI: 10.1002/smll.202106396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/20/2022] [Indexed: 06/14/2023]
Abstract
Control of structural ordering in noble metals is very important for the exploration of their properties and applications, and thus it is highly desired to have an in-depth understanding of their structural transitions. Herein, through high-pressure treatment, the mutual transformations between crystalline and amorphous phases are achieved in Pd nanosheets (NSs) and nanoparticles (NPs). The amorphous domains in the amorphous/crystalline Pd NSs exhibit pressure-induced crystallization (PIC) phenomenon, which is considered as the preferred structural response of amorphous Pd under high pressure. On the contrary, in the spherical crystalline@amorphous core-shell Pd NPs, pressure-induced amorphization (PIA) is observed in the crystalline core, in which the amorphous-crystalline phase boundary acts as the initiation site for the collapse of crystalline structure. The distinct PIC and PIA phenomena in two different heterophase Pd nanostructures might originate from the different characteristics of Pd NSs and NPs, including morphology, amorphous-crystalline interface, and lattice parameter. This work not only provides insights into the phase transition mechanisms of amorphous/crystalline heterophase noble metal nanostructures, but also offers an alternative route for engineering noble metals with different phases.
Collapse
Affiliation(s)
- Qian Li
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
| | - Hongfei Cheng
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Caihong Xing
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
| | - Songhao Guo
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
| | - Xiaotong Wu
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
| | - Liming Zhang
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
| | - Dongzhou Zhang
- Partnership for Extreme Crystallography, University of Hawaii at Manoa, Honolulu, Hawaii, 96822, USA
| | - Xingchen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
| | - Xujie Lü
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China
| | - Hua Zhang
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen, 518057, China
| | - Zewei Quan
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
| |
Collapse
|
2
|
Chun DH, Kim S, Chai SU, Kim W, Kim W, Lee JH, Rhee R, Choi D, Kim JK, Shin H, Park JH. Grain Boundary Healing of Organic-Inorganic Halide Perovskites for Moisture Stability. Nano Lett 2019; 19:6498-6505. [PMID: 31411479 DOI: 10.1021/acs.nanolett.9b02721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although organic-inorganic halide perovskite (OIHP)-based photovoltaics have high photoconversion efficiency (PCE), their poor humidity stability prevents commercialization. To overcome this critical hurdle, focusing on the grain boundary (GB) of OIHPs, which is the main humidity penetration channel, is crucial. Herein, pressure-induced crystallization of OIHP films prepared with controlled mold geometries is demonstrated as a GB-healing technique to obtain high moisture stability. When exposed to 85% RH at 30 °C, OIHP films fabricated by pressure-induced crystallization have enhanced moisture stability due to the enlarged OIHP grain size and low-angle GBs. The crystallographic and optical properties indicate the effect of applying pressure onto OIHP films in terms of moisture stability. The photovoltaic devices with pressure-induced crystallization exhibited dramatically stabilized performance and sustained over 0.95 normalized PCE after 200 h at 40% RH and 30 °C.
Collapse
Affiliation(s)
- Do Hyung Chun
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Sungsoon Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Sung Uk Chai
- Photo-electronic Hybrids Research Center , Korea Institute of Science and Technology (KIST) , Seoul 02792 , Republic of Korea
| | - Wook Kim
- Department of Mechanical Engineering , Kyung Hee University , 1732 Deogyeongdaero , Giheung-gu, Yongin-si , Gyeonggi-do 17104 , Republic of Korea
| | - Wanjung Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Jung Hwan Lee
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Ryan Rhee
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| | - Dukhyun Choi
- Department of Mechanical Engineering , Kyung Hee University , 1732 Deogyeongdaero , Giheung-gu, Yongin-si , Gyeonggi-do 17104 , Republic of Korea
| | - Jung Kyu Kim
- Department of Chemical Engineering , Sungkyunkwan University , Suwon 440-746 , Republic of Korea
| | - Hyunjung Shin
- Department of Energy Science , Sungkyunkwan University , Suwon 440-746 , Republic of Korea
| | - Jong Hyeok Park
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea
| |
Collapse
|
3
|
Abstract
In the case of formulations with amorphous active pharmaceutical ingredients the risk of pressure-induced recrystallization should be carefully considered. We reported here that supercooled etoricoxib (ETB), which was found as a relatively stable system with low crystallization tendency at atmospheric pressure, crystallized quickly after compression. The observed strong pressure-dependence of the induction period suggests that during compression the first step of crystallization that is nucleation may be accelerated. To overcome the experimental challenge associated with studies at elevated temperatures and high pressures we applied broadband dielectric spectroscopy. Dielectric measurements gave us detailed insight into crystallization kinetics of ETB at varying ( T, p) conditions corresponding to the supercooled liquid state of a drug. We found that pressure-induced recrystallization of supercooled ETB, constituting a serious impediment from a technological point of view, can be efficiently inhibited when amorphous solid dispersion containing ETB and polymer polyvinylpyrrolidone PVP (10% w/w) was prepared. Besides, we performed the comprehensive analysis of molecular dynamics of both systems at elevated pressure to address some fundamental issues related to the pressure sensitivity of their supercooled dynamics.
Collapse
Affiliation(s)
- Marzena Rams-Baron
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Justyna Pacułt
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Agnieszka Jędrzejowska
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Justyna Knapik-Kowalczuk
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Marian Paluch
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| |
Collapse
|