Article
Nanoscience & Nanotechnology
Peng-Fei Qian, Jing-Qi Wang, Tao Wang, Xuguo Huai, Wen-Hao Geng, Qiangxia Zhu, Ying Tian, Li-Chao Jing, Ze-Long Bao, Hong-Zhang Geng
Summary: Transparent conductive films with high stability were developed by incorporating silver nanowires into colorless polyimide and adding a protective layer of exfoliated graphene. The resulting films demonstrated excellent light transmission, conductivity, and resistance to peeling, showcasing potential for use in organic electronic devices. Organic light-emitting diode devices utilizing this transparent conductive electrode exhibited comparable efficiency to indium tin oxide (ITO) based devices, with even higher efficiency at operating voltages exceeding 5 V.
Article
Chemistry, Multidisciplinary
Jie Gong, Xiao Fan, Zhangyang Zong, Mingyang Yang, Ya Sun, Guoqun Zhao
Summary: Flexible solar cells have the potential to be an ideal power source for future electronic devices due to their compact structure and adaptable shape. However, the limited flexibility of these cells is caused by the delicate indium tin oxide-based transparent conductive substrates. In this study, a flexible transparent conductive substrate made of silver nanowires embedded in colorless polyimide was developed using a simple and effective transfer method. The resulting substrate showed a well-connected silver nanowire conductive network with low sheet resistance, high transmittance, and smooth morphology. The perovskite solar cells fabricated on this substrate exhibited high efficiency and maintained their initial efficiency after numerous bending cycles. This research highlights the importance of suspension modification for the distribution and connection of silver nanowires and opens up possibilities for high-performance flexible solar cells for practical applications.
Article
Nanoscience & Nanotechnology
Se Yun Kim, Weon Ho Shin, Hyun-Sik Kim, Doh Won Jung, Mi-Jeong Kim, Kwanghee Kim, Jong Wook Roh, Sungwoo Hwang, Jongmin Lee, Daejin Yang, Hiesang Sohn, Seong Heon Kim, Changhoon Jung, Eunae Cho, Dong-Jin Yun, Jinhong Kim, Young Jin Cho, Sang-Il Kim, Kyu Hyoung Lee, Chan Kwak, Dong-Su Ko
Summary: This study introduces a rational design and fabrication process for a silver nanowire-based transparent conductive electrode, which significantly improves the electrode performance through hybridization with RuO2 nanosheets and silver nanoparticles. After 200,000 bending cycles at a curvature radius of 1 mm, the resistance change of this hybrid electrode is only 8.8%, making it feasible for use in foldable devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Shuyue Wang, Xiaoli Wu, Jiaxin Lu, Zhengwu Luo, Hui Xie, Xiaobin Zhang, Kaiwen Lin, Yuehui Wang
Summary: This study proposes a high concentration silver nanowires (AgNWs) conductive ink for inkjet printing, which enables the fabrication of flexible transparent conductive electrodes with low resistance and high transparency. The relationship between the printing layer and the conductivity, as well as the stability and thermal response of the electrode, are investigated. The results demonstrate the potential of inkjet-printed AgNWs-based flexible transparent conductive electrodes for developing flexible functional electronics.
Article
Biochemistry & Molecular Biology
Yuehui Wang, Xiaoli Wu, Ke Wang, Kaiwen Lin, Hui Xie, Xiaobing Zhang, Jingze Li
Summary: By investigating the factors influencing silver nanowire inkjet printing and fabricating flexible transparent conductive films on PET substrates, it was demonstrated that well-defined patterns with good photoelectric properties can be obtained.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Xiaoli Wu, Shuyue Wang, Zhengwu Luo, Jiaxin Lu, Kaiwen Lin, Hui Xie, Yuehui Wang, Jing-Ze Li
Summary: This study discusses the relationship between the formulation of AgNWs ink and surface tension, viscosity, contact angle, and film-forming properties. Furthermore, it analyzes the effects of printed layers and ink concentration of AgNWs on microstructures, photoelectric properties, accuracy of printed patterns, and sheet resistance during bending cycles.
Article
Materials Science, Multidisciplinary
Quoc Hoan Tran, Duc Thanh Chu, Van Hoan Hoang, Quang Trung Do, Sy Hieu Pham, Philippe Leclere, Tam Duy Nguyen, Duy Cuong Nguyen
Summary: In this study, Ag nanowires were synthesized and their electrical and thermal properties were improved by coating an Ag layer. The best sample exhibited enhanced electrical conductivity, thermal stability, and optical transparency under specific conditions.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yuzhou Wang, Yan Liu, Tao Wang, Shuhui Liu, Zeng Chen, Shaobo Duan
Summary: This study presents a highly transparent and conductive hybrid electrode for flexible optoelectronic devices, which is fabricated by a simple spray method. The hybrid electrode exhibits excellent performance, including high transmittance and low sheet resistance.
Article
Nanoscience & Nanotechnology
Wenwen Wang, Zhonglin Yang, Yujia Gu, Zelei Wu, Guixin Wang, Guinan Chen, Minchu Huang, Chenhui Xu, Cui Ye, Wang Zhang, Jianwei Nai, Yongwu Peng, Jun Pan, Changhui Ye
Summary: By combining a reducing species and a thin layer of UV shielding material, the stability and optical performance issues of silver nanowire transparent conductive films under UV light illumination have been successfully addressed, resulting in excellent stability and minimal variation in sheet resistance.
Article
Biochemistry & Molecular Biology
Jizhe Zhang, Xingzhong Zhu, Juan Xu, Ruixing Xu, Hao Yang, Caixia Kan
Summary: This study investigates the preparation methods of transparent conductive films based on silver nanowires (Ag NWs) and compares their performances. The vacuum filtration method produces films with the best surface roughness and uniformity, while the spin coating method is suitable for smaller-sized films. In addition, the Mayer-rod coating and spray coating methods can produce larger-sized films, but process parameters need to be carefully controlled.
Article
Materials Science, Multidisciplinary
Mahesh A. Shinde, Haekyoung Kim
Summary: The study improved the stability and conductivity of AgNWs by applying BTA and TiO2:Cs particles onto AgNW/PET, forming a novel AgNW/BTA/TiO2:Cs/PET structure. It showed exemplary optoelectrical properties and stable electrical performances under different environmental conditions, demonstrating the effectiveness of BTA and TiO2:Cs in enhancing the properties of AgNW films.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yuezhan Feng, Jianzhou Song, Gaojie Han, Bing Zhou, Chuntai Liu, Changyu Shen
Summary: This study presents a stretchable PDMS/AgNW TCE with a fence-like aligned conductive network, which exhibits excellent optoelectronic properties and EMI shielding effectiveness, making it suitable for use in flexible and stretchable optical electronic devices.
Article
Materials Science, Multidisciplinary
Zheng Chen, Xinhai Su, Huihua Luo, Ayingmo Ade, Haifeng Zhu, Yaping Zhang, Lianqing Yu
Summary: A silver nanowires/glass transparent conductive film was prepared using a one-step spin coating method. LCysteine (L-Cys) functionalized silver nanowires were used for surface-enhanced Raman scattering (SERS) detection of heavy metal Hg2+ ions to evaluate the photoelectric performance. The LCys functionalized silver nanowires/glass transparent conductive film showed selective, rapid and sensitive detection of Hg2+. The limit of Hg2+ detection was 10-9 M, which is ten times lower than the maximum Hg2+ concentration in drinking water set by the US Environmental Protection Agency. Moreover, this dual-function transparent conductive silver sensor demonstrated high accuracy and reliability, providing new insights for the design of rapid and sensitive SERS detection of mercury ions and showing great potential for efficient heavy metal detection.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Yuehui Hu, Fang Hu, Yichuan Chen, Hao Gao, Wei Liu, Ke Zhou, Zhijian Min, Wenjun Zhu
Summary: In this paper, aligned AgNWs-TCFs were deposited by using shear force from a high-speed rotating concentrated nanowire solution, which significantly improved the current-loading stability. Compared to other methods, this approach enables controllable preparation and industrial development of aligned AgNWs-TCFs.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhuochao Wang, Peng Wang, Wenxin Cao, Chunqiang Sun, Zicheng Song, Dongchao Ji, Lei Yang, Jiecai Han, Jiaqi Zhu
Summary: A novel polymer-based transparent conductive film has been designed with high mechanical strength, high transmittance, and self-healing efficiency, showing great potential for various applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Engineering, Multidisciplinary
Jinwook Rhyu, Dongjae Kim, Jaewook Nam
Summary: A new indicator, the degree of dispersion (DoD), is proposed in this paper, which possesses features like stability, effectivity, and flexibility. It naturally considers inter- and intracluster dispersions, and has an adjustable parameter for different application contexts. The computation time is relatively short, around 1-3 minutes, making it suitable for various industrial applications.
Article
Electrochemistry
Dongjae Kim, Jaewook Nam
Summary: Transparent conductive films made of metallic nanowires have complex microstructures composed of nanoscale conducting rods, which determine the electrical performance of the film. A network model was created using a multi-nodal representation and converted into an equivalent circuit using Laplacian eigenmap. Centrality concepts such as betweenness centrality, closeness centrality, and degree centrality were used to extract structural information and correlate with the conductivity of the network.
ELECTROCHIMICA ACTA
(2021)
Article
Mechanics
Hyungyeol Kwak, Jaewook Nam
Summary: This study presents two methods for obtaining the critical conditions for flow reversal onset in Couette-Poiseuille flows, one through solving algebraic equations and the other through local approximation. The methods showed reasonably low relative errors in most system parameter ranges, except in highly nonlinear flow curve cases.
JOURNAL OF RHEOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jeong-Chan Lee, Hyeji Seo, Minho Lee, Dongjae Kim, Hyeon Seok Lee, Hyunmin Park, Nathaniel Ball, Junhee Woo, Su Yeong Kim, Jaewook Nam, Steve Park
Summary: A new technique based on 3D geometry model of the meniscus has been proposed to analyze the thin-film solidification process during solution shearing, which elucidates the dendritic growth mechanism of small molecule organic semiconductor and reveals the important relationship between the meniscus and dendrite formation.
ADVANCED MATERIALS
(2022)
Article
Engineering, Chemical
Dongjae Kim, Jungwon Park, Jaewook Nam
Summary: The study focused on visualizing the flow using a new velocimetry method based on image processing and deducing a slip parameter by comparing experiments and computations.Various flow rates were computationally explored based on the model to investigate slip behavior.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Chemical
Keon Bae, Jun Young Kim, Kang Seok Go, Nam Sun Nho, Dongjae Kim, Jong Wook Bae, Dong Hyun Lee
Summary: The study aimed to quantitatively analyze the transition point of bubble/micro-bubble regime in a bubble column. It found that as gas velocity at the orifice increased, the sizes of bubbles falling apart from the nozzle also increased, along with an increase in standard deviation of differential pressure. Bubbles grew until they fell from the tip of the jet under certain conditions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Sun Kyung Kim, Si Yoon Kim, Ju Young Lee, Jaewook Nam, Won Bo Lee, Seok Kim, Kyu Hyun
Summary: Research shows that ionic liquids (ILs) can enhance the ionic conductivity of solid polymer electrolytes (SPEs) but may have a detrimental effect on mechanical properties. Additionally, silica nanoparticles (SiNPs) do not significantly impact ionic conductivity in SPEs. The suspensions used for making SPEs exhibit shear thinning and yield stress behavior, depending on the concentrations of ILs and SiNPs.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Chemical
Hyungyeol Kwak, Jaewook Nam
Summary: This study investigates the influence of the coating gap on the maximum and minimum wet thicknesses in slot-die coating process, and establishes a simple flow model with analytical expressions. The results show that the minimum wet thickness increases linearly with the coating gap, while the maximum wet thickness exhibits a counterintuitive trend of decreasing with the increasing coating gap under a specific slot-die configuration.
Article
Engineering, Chemical
Woo Chang Sung, Seok Woo Chung, Jun Young Kim, Dong Hyun Lee
Summary: The dynamic angle of repose during continuous falling particles was simulated using computational particle fluid dynamics (CPFD). The effect of hopper height and hopper inlet diameter on the angle of repose was investigated. The results show that increasing hopper height reduces the angle of repose, while decreasing the inlet diameter increases the descending area of particles and thus increases the angle of repose. The designed hopper based on these results can significantly increase the particle discharge rate.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Myungjae Lee, Hyunjoon Jung, Minho Lee, Hyungyeol Kwak, Jaewook Nam
Summary: Slot coating is commonly used in lithium-ion battery electrode manufacturing. However, using a battery slurry for coating experiments poses some challenges. In this study, a carboxymethyl cellulose (CMC) solution was proposed as a candidate for battery anode slurry for coating flows. The rheological properties of the slurry and model fluid were measured, and a computational analysis of the coating flow was conducted. The CMC solution was found to be a valuable candidate for experimental research on the coating flow of battery anode slurries.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Chemical
Keon Bae, Jun Young Kim, Kang Seok Go, Nam Sun Nho, Dongjae Kim, Jong Wook Bae, Dong Hyun Lee
Summary: This study investigated the effects of the variance in heat transfer coefficient on microbubble formation and dual gas distribution. The results showed that the heat transfer coefficient increased with increasing superficial gas velocity, and the amount of microbubble generation also increased with an increase in pressure and gas velocity.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Jun Young Kim, Dongjae Kim, Zezhong John Li, Claudio Dariva, Yankai Cao, Naoko Ellis
Summary: Machine learning was used to predict the yield of biomass gasification, and the results showed that Random Forest and Artificial Neural Network had high prediction accuracy. The Monte Carlo filtering method was used to forecast the desired products and identify significant variables for optimization.
Article
Physics, Fluids & Plasmas
Nayeon Park, Jaewook Nam
Summary: This paper presents an in-depth analysis of pulsatile shear-thinning flows in two-dimensional channels by introducing the non-Newtonian Womersley number. It is found that the shape of the master curve is determined by the shear thinning degree, and the competition between viscous and pulsatile time scales can be appropriately described by this number.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Chemistry, Multidisciplinary
Jihoon Oh, Dongjae Kim, Seunggeon Lee, Jaewook Nam
Summary: Controlling microstructure improves battery energy density and reduces energy consumption. This study introduces the LASSO regularization method to accurately estimate 3D spherical size distribution, and demonstrates its superiority in predicting the distribution compared to other methods.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Physics, Fluids & Plasmas
Junmo Lee, Jaewook Nam
Summary: This study investigates the percolation threshold of curved linear objects, represented as quadratic Bezier curves. By utilizing Monte Carlo simulations, critical number densities of the curves with varying curviness were calculated, along with the excluded area. Apparent conductivity exponents were computed, showing similarities with sticks in percolative systems, providing insights for analyzing the optoelectrical performance of metal nanowire films.
