Article
Chemistry, Physical
Ada Herrero-Ruiz, Gregorio Carolo, Guillermo Gonzalez-Rubio, Marek Grzelczak, Jan S. Niehaus, Horst Weller, Luis M. Liz-Marzan
Summary: In this study, we demonstrate the use of a purposely devised millifluidic flow reactor for the seeded growth of monodisperse gold nanoparticles. The system offers high process control and batch-to-batch reproducibility, allowing for the synthesis of various gold nanoparticle shapes and dimensions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Fengqi Qin, Huan Zhang, Taixing Tan, Jie Wang, Huiling Liu, Cheng Wang
Summary: In this study, a seed-mediated synthesis method for mass production of ultrathin silver nanowires (AgNWs) was reported. The synthesized AgNWs had an average diameter of 17 nm and an aspect ratio of 1000. The method utilized pentatwinned gold dodecahedrons as primitive seeds and Ag nanorods (AgNRs) as secondary seeds. The process eliminated the need for purification and resulted in high purity AgNWs through a simple precipitation process.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Siva Kumar Krishnan, Rodrigo Esparza, Daniel Bahena Uribe, Sundeep Mukherjee, Umapada Pal
Summary: The study demonstrated a seed-mediated coreduction method for preparing Pd@AuCunL core-shell nanocubes with atomic-level control over shell thickness. The synergistic effect of the Pd core and the AuCu alloy shell contributed to the high catalytic activity of the core-shell nanocubes, which showed promising applications in heterogeneous catalysis reactions. The simple solution-based approach used in this work can be adapted for controlled synthesis of other multimetallic core-shell nanocubes with atomically controlled shell thickness.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Claire Goldmann, Marta De Frutos, Eric H. Hill, Doru Constantin, Cyrille Hamon
Summary: The study introduces a simple aqueous approach to breaking the inversion symmetry of silver nanorods by controlling the addition of DMSO, showcasing the potential of DMSO for controlling complex nanostructure synthesis. Simulations and experiments demonstrate the impact of DMSO adsorption on various surface interactions, affecting the deposition kinetics of silver.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Analytical
Galina V. V. Presnova, Gleb A. A. Zhdanov, Luibov Yu. Filatova, Mariya M. M. Ulyashova, Denis E. E. Presnov, Maya Yu. Rubtsova
Summary: Gold nanoparticles (AuNPs) are used to enhance color intensity for DNA membrane microarrays through seed-mediated growth. The method involves hybridization of biotin-labeled DNA with capture oligonucleotide probes, followed by detection of AuNPs through a streptavidin-AuNP conjugate. The optimized seed-mediated enlargement of AuNPs resulted in larger particles and improved signal/background ratio.
Article
Chemistry, Multidisciplinary
Zhiwei Li, Jian Zhang, Jianbo Jin, Fan Yang, Rashed Aleisa, Yadong Yin
Summary: This study demonstrates the creation of surface concavity in Au nanorods through seed-mediated growth in confined spaces and their thermochromic responses to temperature changes. By templating against Fe3O4 nanorods, a unique surface concavity is created, allowing precise tuning of the nanorods' plasmonic properties through aging in different solvents.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Ji Feng, Dongdong Xu, Fan Yang, Jinxing Chen, Chaolumen Wu, Yadong Yin
Summary: The introduction of a thin layer of metal with considerable lattice mismatch can effectively induce the nucleation of well-defined Au islands on Au nanocrystal seeds, leading to complex Au nanostructures with morphologies tunable from core-satellites to tetramers, trimers, and dimers by controlling the interfacial energy between the seed and the deposited material, the oxidative ripening, and the surface diffusion of metal precursors.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Meng-Qi He, Yongjian Ai, Wanting Hu, Liandi Guan, Mingyu Ding, Qionglin Liang
Summary: The unprecedented advances in metal nanoparticle synthesis have opened up new possibilities for their broad applications. The precise control of metal nanoparticle morphology relies on seed-mediated growth methods, which are sensitive to various influencing factors. The understanding of how each factor precisely regulates the morphology of metal nanoparticles is important for further developments and applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ekaterina Podlesnaia, Andrea Csaki, Wolfgang Fritzsche
Summary: This study successfully determined the necessary reaction time for each step of synthesizing shape-anisotropic plasmonic nanoparticles like gold nanotriangles by replicating a seed-mediated synthesis method with high reproducibility. Real-time investigations elucidated the kinetics of the individual stages, leading to the optimization of the complete synthesis, reducing the synthesis time from three days to one without any loss in sample quality.
Article
Chemistry, Multidisciplinary
Yanfang Hu, Yonglong Li, Linfeng Yu, Yuying Zhang, Yuming Lai, Wei Zhang, Wei Xie
Summary: A universal assembly methodology for preparing hetero-superstructures is introduced in this study, enabling the assembly of building block materials without the need for molecular linkers and utilizing surface property modulation to achieve self-organization. The resulting superstructures exhibit superior photocatalytic activity and Raman scattering performance.
Article
Chemistry, Multidisciplinary
Jack S. Googasian, George R. Lewis, Zachary J. Woessner, Emilie Ringe, Sara E. Skrabalak
Summary: Chiral plasmonic nanocrystals with varied symmetries were synthesized through overgrowth, highlighting the importance of chiral molecule adsorption at kink sites.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Xiao-Bin Mang, Lian-Qi Yao
Summary: Functionalized gold nanoparticles (GNPs) were studied for their nanostructure using X-ray diffraction (XRD). The presence of ligands and co-ligands was found to induce long-range ordered packing style with temperature change.
Article
Chemistry, Physical
Chaoying Tong, Xia Tong, Yuanxin Cao, Guihan Cai, Tongtao Wang, Qisheng Wei, Shuyun Shi, Ying Guo
Summary: The fundamental mechanism of solvent-mediated reduction of HAuCl4 by carbon dots (CDs) to form gold nanoparticles (AuNPs), as well as the surface characteristics that determine their dispersion and aggregation, have been explored in this study. It was found that monodispersed core-shell AuNPs@CDs were synthesized in water, while aggregated AuNPs@CDs were formed in ethanol. A colorimetric ethanol sensor based on AuNPs@CDs was proposed, which showed high selectivity.
Article
Chemistry, Multidisciplinary
Ryota Kojima, Yuga Ogino, Shin-ichi Naya, Tetsuro Soejima, Hiroaki Tada
Summary: Radial homomesocrystals consisting of rutile TiO2 nanorods were synthesized using TiO2 seed nanocrystals, which greatly reduced the synthesis temperature and time. The formation of these homomesocrystals involved the epitaxial generation of nanoneedle-like nuclei on the seed surface, the growth of TiO2 nanorods, and their radial self-assembling with the transformation of amorphous to rutile TiO2. Loading Au nanoparticles on these homomesocrystals resulted in higher visible-light activity for oxidation of organics compared to the usual Au/TiO2 nanoparticles, due to the formation of plasmonic hot spots near the edges and corners of the faceted Au nanoparticles and effective charge separation.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Xu Fan, Senyuan An, Jia Jia, Wenjia Xu, Xiaoying Wu, Jianpeng Zong, Yun Wang, Hongyu Chen, Yuhua Feng
Summary: By utilizing strong thiol ligands to control the interfacial energy, Au-Cu bimetallic Janus structures were successfully obtained. The degree of Janus structures can be tuned by varying the molecular structure and the amount of ligands.
CHEMISTRY OF MATERIALS
(2022)
Article
Electrochemistry
Muhammad Nurdin, Muhammad Zakir Muzakkar, Maulidiyah Maulidiyah, Cici Sumarni, Thamrin Azis, Ratna Ratna, Muhammad Natsir, Irwan Irwan, La Ode Agus Salim, Akrajas Ali Umar
Summary: In this study, a new catalyst design was demonstrated to efficiently degrade Reactive yellow 105 dye through photoelectrocatalytic degradation under visible light irradiation. The results showed that the new photocatalyst exhibited significantly higher degradation rate than the pristine photocatalyst under both UV and visible light irradiation.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Marjoni Imamora Ali Umar, Muhammad Nurdin, Atiek Rostika Noviyanti, Dahyunir Dahlan, Ari Sulistiyo Rini, Akrajas Ali Umar
Summary: Ultra-thin Au nanoplates exhibit exceptional electrocatalytic properties due to their unique two-dimensional electron confinement. The analysis of these nanoplates shows that they offer significantly higher electrocatalytic performance in the redox reaction of cytochrome c compared to Au nanospheres, thanks to the two-dimensional arrangement of (111) surface atoms, the presence of high-energy atoms at the edge, and both transversal and longitudinal surface plasmon resonance. This discovery suggests that Au nanoplates could be extensively applied in organic reactions, sensing, and surface plasmon resonance.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Chemistry, Analytical
Xiaomei Chen, Mingming Yin, Rui Ge, Jie Wei, Tianhui Jiao, Qingmin Chen, Munetaka Oyama, Quansheng Chen
Summary: Sensitive, portable detection methods for foodborne pathogens are important for early warning and prevention of diseases. This study used AgBiS2 nanoflowers and Cu2O nanocubes to develop a novel photoelectrochemical immunosensor. By combining n-type AgBiS2 nanoflowers and p-type Cu2O nanocubes with monoclonal and polyclonal antibodies, a highly efficient photocurrent-switching system was formed on a paper-based electrode. The NIR PEC immunoassay exhibited a low detection limit and could be used for point-of-care testing of E. coli O157:H7.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
U. A. Kamarulzaman, M. Y. A. Rahman, M. S. Su'ait, A. A. Umar
Summary: Preparation of NiPd-rGO cathode via LPD technique and its effect on the performance of DSSC have been studied. The deposition temperature of NiPd has been found to significantly influence the morphology, elemental composition, and optical transmittance of the samples. The DSSC device using NiPd-rGO cathode prepared at a deposition temperature of 60 degrees C shows the highest PCE of 3.07% due to its lowest R-ct and highest R-cr.
Article
Chemistry, Multidisciplinary
La Ode Agus Salim, Muhammad Zakir Muzakkar, Ahmad Zaeni, Maulidiyah Maulidiyah, Muhammad Nurdin, Siti Naqiyah Sadikin, Jaenuddin Ridwan, Akrajas Ali Umar
Summary: Doping TiO2 with sulfur (S) improves the photoelectrical properties of the photoanode, increasing the power conversion efficiency of dye-sensitized solar cells (DSSC).
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Nurdin, Abdul Haris Watoni, Muhammad Natsir, Sarifa Rahmatilah, Maulidiyah Maulidiyah, Dwiprayogo Wibowo, La Ode Agus Salim, Siti Naqiyah Sadikin, Catherina Manukpadang Bijang, Akrajas Ali Umar
Summary: A novel photoelectrocatalyst of Se doped-TiO2/Ti nanotube arrays (Se@TiO2/Ti-NTAs) was prepared and exhibited high-efficiency degradation of pollutants under visible light irradiation. The Se@TiO2/Ti-NTAs promoted active photoelectron transfer and active radical formation for rapid pollutant degradation. This new photoelectrode shows potential for environmental pollution treatment.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Optics
U. A. Kamarulzaman, M. Y. A. Rahman, M. S. Su'ait, A. A. Umar
Summary: In this study, NickelPalladium-reduced graphene oxide (NiPd-rGO) films were prepared and used as free-platinum (Pt) counter electrode for dye-sensitized solar cell (DSSC) through liquid phase deposition technique. The influence of Pd content on the properties of the films was studied, including structure, optical transmission, surface morphology, and elemental compositions. The performance parameters of the device were significantly affected by the Pd content, with the device using NiPd-rGO counter electrode at Ni:Pd ratio of 20:2 demonstrating the highest efficiency of 3.09%.
Article
Energy & Fuels
Fatemeh Behrouznejad, Xiaoguo Li, Akrajas Ali Umar, Xin Zhang, Rouhollah Khosroshahi, Siti Khatijah Md Saad, Irfan Ahmed, Nima Taghavinia, Yiqiang Zhan
Summary: In this research, the effect of different mechanisms on IPCE spectra and the difference between Jsc values from J-V and IPCE curves of n-i-p PSCs were investigated. The results showed that removing the ETL did not change the IPCE spectrum significantly, while removing the HTL resulted in a substantial decrease in IPCE value and deformation in the shape of the spectrum. Additionally, the nonlinearity of the device's characteristics with light intensity was shown to affect the difference between Jsc values from J-V and IPCE curves.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Muhammad Nurdin, Ilham Ilham, Maulidiyah Maulidiyah, Muh. Zakir Muzakkar, Dwiprayogo Wibowo, Zul Arham, La Ode Agus Salim, Irwan Irwan, Catherina Bijang, Akrajas Ali Umar
Summary: The effect of Te doping on the TiO2/Ti nanotube arrays (NTAs) for photoelectrochemical COD detection was investigated. The Te doping enhanced the photoelectrocatalytic properties of the TiO2/Ti NTAs electrode, as demonstrated by improved linearity, accuracy, and repeatability in measuring test compound chemicals. The Te-TiO2/Ti NTAs electrode exhibited higher linearity up to 10 μM concentration compared to the pristine TiO2/Ti NTAs system (up to 5 μM). It also provided higher accuracy (up to 100% fit to theoretical value) and lower repeatability (1.8% RSD) compared to the TiO2/Ti NTAs electrode (less than 80% accuracy, 2% RSD).
Article
Chemistry, Multidisciplinary
Marjoni Imamora Ali Umar, Annisa Zahra Ahdaliza, Salah M. M. El-Bahy, Nur Aliza, Siti Naqiyah Sadikin, Jaenudin Ridwan, Abang Annuar Ehsan, Mohammed A. A. Amin, Zeinhom M. M. El-Bahy, Akrajas Ali Umar
Summary: The crystalline properties of perovskite film were optimized through annealing treatment under high humidity conditions. The resulting perovskite solar cells exhibited a power conversion efficiency of 17.77%, with a carrier lifetime of 25 ns and low interfacial charge transfer resistance. These findings provide guidance for the industrialization of perovskite solar cells.
Article
Multidisciplinary Sciences
Setia Budi, Mari Takahashi, Mega Gladiani Sutrisno, Wisnu Ari Adi, Zahra Fairuza, Budhy Kurniawan, Shinya Maenosono, Akrajas Ali Umar
Summary: A pure-phase Cu2O film photocatalyst was successfully prepared using the electrodeposition technique. The deposition temperature was found to influence the phase evolution and photocatalytic activity of the film. A pure Cu2O film with a narrow optical bandgap energy of 1.96 eV was obtained at 75°C, while multi-faceted crystals were formed at 45°C. The photocatalytic activity of the Cu2O film increased with increasing deposition temperature due to the rise in photoelectrochemical response, decrease in resistance charge transfer, and growth of a high catalytic activity facet.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Nabilah Alias, Akrajas Ali Umar, Siti Naqiyah Sadikin, Jaenudin Ridwan, Azrul Azlan Hamzah, Marjoni Imamora Ali Umar, Abang Annuar Ehsan, Muhammad Nurdin, Yiqiang Zhan
Summary: By introducing hexamine molecules into the perovskite lattice, the photoactive phase stability of perovskite solar cells can be enhanced, resulting in high-performance and air-processable cells. The unencapsulated and freshly prepared cells demonstrate a power conversion efficiency of 16.83% under a 100 mW cm(-2) 1.5G solar light simulator and exhibit high stability properties after being stored for more than 1500 h in humid air.
Article
Agriculture, Multidisciplinary
Jinjin Wang, Silun Li, Jie Wei, Tianhui Jiao, Qingmin Chen, Munetaka Oyama, Quansheng Chen, Xiaomei Chen
Summary: To prevent contamination of cereals by mycotoxins, a sensitive and rapid method for mycotoxin detection is essential. In this study, a screening-capture-integrated electrochemiluminescence (ECL) aptasensor based on mesoporous silica films (MSFs) was developed for the ultrasensitive and highly selective detection of deoxynivalenol (DON) in wheat. The sensor combines size screening and specific capture to achieve quantitative detection of DON, providing a new approach for early detection of wheat mildew.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Analytical
Hanjie Dai, Mingming Yin, Shumin Zhang, Jie Wei, Tianhui Jiao, Qingmin Chen, Quansheng Chen, Xi Chen, Munetaka Oyama, Xiaomei Chen
Summary: In this study, a novel paper-based photoelectrochemical sensor was developed for rapid and sensitive detection of Staphylococcus aureus. By utilizing specific modifications, the capture of S. aureus with high specificity was achieved, and signal enhancement was achieved using nanoflower probes. The sensor demonstrated rapid and ultrasensitive detection capabilities.
Article
Chemistry, Applied
Xueqi Lin, Rui Ge, Jie Wei, Tianhui Jiao, Qingmin Chen, Munetaka Oyama, Quansheng Chen, Xiaomei Chen
Summary: This study developed a magnetic-encoded fluorescent nanosphere-based immunosensor for simultaneous detection of multiple mycotoxins in wheat. The sensor showed high accuracy, selectivity, and sensitivity.
