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
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, Physical
Silvia Nuti, Adriaïn Fernandez-Lodeiro, Lidia E. Chinchilla, Ana B. Hungria, Jose-Luis Capelo-Martinez, Carlos Lodeiro, Javier Fernandez-Lodeiro
Summary: This study presents a simple method for fabricating Au@Pd bimetallic branched nanoparticles, which allow for tunable optical response, using polyallylamine-stabilized branched AuNPs as template cores for Pd overgrowth. The concentration of PdCl4(2-) and ascorbic acid (AA) can be manipulated to alter the palladium content, enabling the growth of a Pd shell up to approximately 2 nm thick. The presence of palladium on the surface of gold nanoparticles enhances their catalytic properties, as demonstrated through a comparison of nanoenzymatic activity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
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, Inorganic & Nuclear
Dongxiang Li, Rui Huang, Xing Qian, Chunfang Li
Summary: This letter presents an improved light-driven seed growth method for the synthesis of high-yield triangular silver nanoplates (TSNPs) using trisodium citrate (TSC) as the photoreducing and capping reagent. TSNPs exhibit tunable plasmonic properties and hold promise for chemical and biological sensing, as well as optical limiters.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Chunyu Zhou, Tao Sun, Mingfu Gong, Zhongsheng Xu, Liang Zhang, Qiaoqiao Li, Mengmeng Du, Xun Kang, Yun Liu
Summary: This study introduces a novel strategy for assembling gold nanoparticles into chainlike structures and investigates the role of ethylamine in the assembly process. It is found that the volume ratio of ethanol/water affects the assembly speed and length of the chainlike assemblies, and the primary amine is essential for AuNP assembly. Additionally, the study proposes possible mechanisms for controlling AuNP assembly through surface engineering.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Plant Sciences
Isabela S. Lopes, Flavia R. de O. Silva, Lilia C. Courrol
Summary: Seed priming with nanoparticles, specifically copper-silver nanoparticles, improves sunflower seed germination, growth, and chlorophyll production compared to water and aminolevulinic acid (ALA) priming. The nanoparticles were prepared using the photoreduction process with ALA as a stabilizing/capping agent. The study measured various parameters including germination percentage, shoot length, root length, seedling vigor index (Vi), allometric coefficient, and fluorescence spectra of chlorophyll extract. The results suggest that nanopriming with copper-silver nanoparticles can enhance the productivity of sunflower seeds.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Chemistry, Physical
Brajesh Kumar, Kumari Smita, Erika Sanchez, Alexis Debut, Luis Cumbal
Summary: In this study, silver nanoparticles (AgNps) were successfully biosynthesized and stabilized using Andean Sacha inchi seed flour. Characterization techniques confirmed the spherical shape and average size range of 10-40 nm for the AgNps, as well as their stability and photocatalytic degradation activity against methyl orange dye.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Amrita Chakraborty, Megha Maria Stanley, Biswajit Mondal, Nonappa, Mohammad Bodiuzzaman, Papri Chakraborty, M. P. Kannan, Thalappil Pradeep
Summary: Quantized energy levels and unique optoelectronic properties of atomically precise noble metal nanoclusters have made them important in various fields. Recent studies have shown that these nanoclusters can either participate in colloidal assembly or lead to products with atom exchange depending on the reactant. Furthermore, anisotropic plasmonic nanoparticles with sharp edges and protrusions exhibit higher chemical reactivity and can induce site-specific growth of foreign metals and metal oxide shells.
Article
Nanoscience & Nanotechnology
Qi Zhang, Tian-Song Deng, Yun-Qi Dou, Ming-Zhang Wei, Shiqi Li, Jia Liu, Zhiqun Cheng
Summary: A trimetallic nanostructure was designed and used as a plasmon-mediated photocatalyst. By optimizing the composition of the shell, nanoparticles with excellent catalytic performance were obtained.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Meng-Qi He, Yongjian Ai, Wanting Hu, Xiaomeng Jia, Lei Wu, Mingyu Ding, Qionglin Liang
Summary: By using DNA as an etching agent, it is possible to control the morphology and optical properties of plasmonic nanoparticles, while also introducing fluorescence properties. This strategy allows for precise tuning of localized surface plasmon resonance (LSPR) and fluorescence-composited dual-mode signals.
ANALYTICAL CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Xiao Liu, Wei Zhou, Tianjun Wang, Sen Miao, Sheng Lan, Zhongchao Wei, Zhao Meng, Qiaofeng Dai, Haihua Fan
Summary: In this study, the photothermal effect and up-conversion florescence imaging effect of gold nanobipyramids in liver cancer cells were investigated to explore a more effective and less invasive photothermal ablation tumor therapy. The study found that the small-size gold nanobipyramids with good biocompatibility and infrared absorption peak were able to effectively kill cancer cells when irradiated with a low power laser for a short period of time. This therapy reduces treatment time, treatment range, and laser power, and leads to cell death by apoptosis instead of necrosis, reducing inflammation.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Xuehao Sun, Jian Yang, Lichao Sun, Guizeng Yang, Chuang Liu, Yunlong Tao, Qingqing Cheng, Chen Wang, Hongxing Xu, Qingfeng Zhang
Summary: This study investigates the growth mechanism of plasmonic nanoparticles with an intrinsic chiral structure and demonstrates that the signal reversal of circular dichroism can be achieved through the hybridization of bichiral centers. Experimental results show that chiral molecules not only contribute to the chirality transfer from molecules to nanoparticles but also manipulate the structural evolution of nanoparticles.
Article
Chemistry, Multidisciplinary
Ming-Zhang Wei, Tian-Song Deng, Qi Zhang, Zhiqun Cheng, Shiqi Li
Summary: This study successfully synthesized gold nanorods with tunable size and aspect ratio, high monodispersity, and high purity by using the seed-mediated method and very low concentrations of CTAB. The growth conditions were optimized to achieve these results, and the method may be extended to synthesize other nanomaterials at such low CTAB concentrations.
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
Engineering, Chemical
Solihudin Solihudin, Haryono Haryono, Atiek Rostika Noviyanti, Akrajas Ali Umar
Summary: The study investigates the influence of carbonization temperature of rice husk char on SiC structure and the composition of by-products in magnesiothermic reduction. Rice husk char was carbonized at temperatures of 700, 800, 900, and 1000 degrees C and converted to SiC through magnesiothermic reduction. The products were characterized by FT-IR, XRD, and SEM-EDS. The results indicate that carbonization at 1000 degrees C produced 2H-SiC and by-products of MgO, Mg2SiO4, and Si.
Article
Materials Science, Biomaterials
Muhammad Nurdin, La Ode Muhammad Zuhdi Mulkiyan, Sri Sugiwati, Haznan Abimayu, Zaenal Syam Arifin, Muryanto Muryanto, Maulidiyah Maulidiyah, Zul Arham, La Ode Agus Salim, Irwan Irwan, Akrajas Ali Umar
Summary: This study aims to optimize the biological hydrolysis of oil palm empty fruit bunches (OPEFB) using Aspergillus niger InaCC F57. The results show that the performance of A. niger InaCC F57 in the hydrolysis process is influenced by the pretreatment stage. The optimal conditions for enzymatic hydrolysis of OPEFB were determined to be a temperature of 40°C, pH of 5, incubation time of 48 hours, 10% substrate concentration, and the addition of nutrient salt solution.
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, Inorganic & Nuclear
N. A. S. Aziz, M. Y. A. Rahman, A. A. Umar, E. R. Mawarnis
Summary: This study focuses on the use of iridium-palladium (Ir-Pd) binary alloy as a counter electrode (CE) for dye-sensitized solar cells (DSSC). By adjusting the concentration of hydrogen hexachloroiridate (IV) hydrate (H2Cl6Ir·H2O), the property and performance of the CE were investigated. The device with Ir-Pd CE containing 0.7 mM H2Cl6Ir·H2O demonstrated the highest power conversion efficiency (PCE) compared to the device with platinum (Pt) CE.
DALTON TRANSACTIONS
(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.