Article
Chemistry, Multidisciplinary
Hung Ji Huang, Ming-Hua Shiao, Yang-Wei Lin, Bei-Ju Lin, James Su, Yung-Sheng Lin, Han-Wei Chang
Summary: The study evaluated the effects of Au cores in Ag shells on enhancing surface-enhanced Raman scattering (SERS) with samples of different Au/Ag ratios. The synthesized Au@Ag-DNFs/Si samples showed that the Au core played a role in focusing the illumination light and enhancing the SERS response of the Ag coverage.
Article
Chemistry, Multidisciplinary
Soohyun Lee, Insub Jung, Jiwoong Son, Sungwoo Lee, Minsun Park, Ji-Eun Kim, Woocheol Park, Jaewon Lee, Jwa-Min Nam, Sungho Park
Summary: We report a synthetic approach for the fabrication of intertwined heterometallic nanorings, in which three differently sized metal rings overlap concentrically. The synthetic method allows control over the core ring component and tunable gap distance. The narrow circular nanogaps between inner and outer Au rings enhance electromagnetic near-field, enabling surface-enhanced Raman scattering at the single-particle level. In particular, when the middle ring component is Pt, the in situ SERS measurement of electrochemical reactions on Pt domains can be monitored due to the near-field focusing assisted by plasmonic Au nanorings.
Article
Chemistry, Multidisciplinary
Jie Huang, Tianxiang Zhou, Wenshi Zhao, Min Zhang, Zhibo Zhang, Wangsheng Lai, Naveen Reddy Kadasala, Huilian Liu, Yang Liu
Summary: In this study, magnetic core-shell-satellite nanocomposites were successfully prepared and applied for ultra-sensitive surface-enhanced resonance Raman scattering (SERRS) detection of bisphenol A (BPA). The nanocomposites exhibited outstanding SERRS sensitivity and saturation magnetization, providing a new idea for the tailored design of ultra-sensitive SERRS substrates. It shows great potential in pollutant detection, environmental monitoring, and food safety.
Article
Chemistry, Physical
Jamal Aziz, Naila Nasir, Ehsan Elahi, Awais Ali, Shahid Mehmood, Honggyun Kim, Deok-kee Kim, Arshad Saleem Bhatti
Summary: Metal/semiconductor nanocomposites have the potential to tune the optical and electrical properties of semiconductors at the nanometer scale. The resonant excitation of surface plasmons of metal nanoparticles can couple with semiconductors and tune their optical emissions. This study thoroughly examines the coupling of surface plasmons and excitons using temperature dependent photoluminescence and Raman spectroscopy in Au-NPs coated ZnO nanowires. The results demonstrate the potential applications of Au/ZnO composites in plasmonic based nanoelectronics for memory and neuromorphic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Fengrui Li, Baojie Shan, Xiaofei Zhao, Chang Ji, Zhen Li, Jing Yu, Shicai Xu, Yang Jiao, Chao Zhang, Baoyuan Man
Summary: This study proposes a new composite nanofiber membrane, PVDF@Ag-ZnO/Au, that utilizes the coordination of piezoelectric and plasmonic effects to regulate the separation and migration of photo-generated carriers. The membrane shows enhanced photocatalytic degradation of organic dyes and has excellent flexibility and recyclability.
Article
Chemistry, Analytical
Di Liu, Huimin Gao, Wenji Jiang, Su Yan, Hao Liu, Junjie Chen, Sisi Wen, Wei Zhang, Xu Wang, Bing Zhao, Wei Song
Summary: In this study, three-dimensional Ag aerogel-supported Hg single-atom catalysts were used as an efficient SERS substrate for monitoring enhanced oxidase-like reactions. The effect of Hg2+ concentrations on the SERS properties of 3D Hg/Ag aerogel networks was investigated, and an optimized addition of Hg2+ resulted in specific enhancement. The formation of Ag-supported Hg SACs was confirmed using HAADF-STEM imaging and XPS measurement, and the oxidase-like catalytic mechanism of Hg/Ag SACs was revealed using DFT. This research provides a mild synthetic strategy for fabricating Ag aerogel-supported Hg single atoms with promising prospects in various catalytic fields.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Qihang Tian, Shiyi Cao, Guangyuan He, Yuting Long, Xuedong Zhou, Jihong Zhang, Jun Xie, Xiujian Zhao
Summary: In this study, Au-Ag alloy nanostars were synthesized and assembled on optical fibers to fabricate fiber probes for ultra-trace molecular detection. The fiber probes demonstrated high sensitivity and good reproducibility, making them suitable for quantitative analysis in chemistry, biology, and other fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Sen Li, Defu He, Shuning Li, Ruipeng Chen, Yuan Peng, Shuang Li, Dianpeng Han, Yu Wang, Kang Qin, Shuyue Ren, Ping Chen, Zhixian Gao
Summary: In this study, a novel aptamer sensor based on magnetic separation and surface-enhanced Raman scattering (SERS) was proposed for the sensitive and specific detection of trace BPA. The sensor showed high sensitivity and specificity through the pairing of the BPA aptamer and DNA. The proposed aptasensor is a promising biosensing platform for BPA detection.
Article
Chemistry, Physical
Zhihong Wang, Minghao Shang, Honglei Chen, Tiexin Sun, Bohao Zhang, Yaohui Zhang, Kongfa Chen, Zhe Lv
Summary: In this study, a simple and cost-effective method for synthesizing monolithic nanoporous Ag (MNPA) is reported. The method involves direct reduction of insoluble Ag2O precursor in an aqueous solution, avoiding the introduction of secondary components and complex preparation of precursors. The formation of porous structures is attributed to both volume shrinkage and spontaneous reconstruction of reserved Ag atoms. The optimized MNPA exhibits ultrahigh SERS sensitivity as a SERS substrate, with an enhancement factor of 10^9.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Magdalena A. Zajac, Boguslaw Budner, Malwina Liszewska, Bartosz Bartosewicz, Lukasz Gutowski, Jan L. Weyher, Bartlomiej J. Jankiewicz
Summary: The results of comparative studies on PLD and MS fabricated GaN/Ag substrates for SERS are reported. The SERS properties of the substrates were evaluated by measuring the SERS spectra of 4-mercaptobenzoic acid molecules adsorbed on them. The PLD-made GaN/Ag substrate exhibited approximately 4.4 times higher enhancement factor than the best MS-made substrate.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Chuhong Zhu, Qiangsheng Zhao, Xiujuan Wang, Zhongbo Li, Xiaoye Hu
Summary: In this study, a functional SERS system was developed for sensitive detection of target analytes using concentration of analyte molecules on or nearby plasmonic nanostructures. The composite film of Ag-nanocubes/graphene-oxide/Au-nanoparticles on a hydrophobic surface effectively accumulated analyte molecules for enhanced SERS activity. The system showed promising applications in food safety inspection and environmental pollutant monitoring.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Ruipeng Chen, Yunfeng Sun, Bingyang Huo, Zefeng Mao, Xiaojuan Wang, Shiyu Li, Ran Lu, Shuang Li, Jun Liang, Zhixian Gao
Summary: A universal surface-enhanced Raman scattering (SERS) aptasensor was developed for the detection of Zearalenone (ZEN) with a linear detection range from 0.005 to 500 ng mL(-1) and a detection limit of 0.001 ng mL(-1). The sensor showed excellent performance for analytical applications with real-world samples.
ANALYTICA CHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Yimin Fan, Tao Zhang, Zubo Cai, Dongxian Li, Weisheng Yue, Tiancheng Gong, Yunfei Luo, Ping Gao
Summary: Arrays of gold-silver bimetallic nanopillars were fabricated using surface-plasmon lithography and their enhancement properties as surface-enhanced Raman scattering substrates were studied. The nanopillars showed a good response in the detection of methylene blue molecules at a low concentration. The Au-Ag bimetallic coating exhibited higher SERS enhancement compared to pure Au or Ag coatings. This study demonstrates the potential of the fabricated SERS substrates for detecting biochemical molecules at trace levels, and surface-plasmon lithography as a promising method for fabricating SERS substrates.
Article
Biochemical Research Methods
Wendai Cheng, Ping Tang, Xuanmeng He, Xinyue Xing, Shengde Liu, Feng Zhang, Xiaoxu Lu, Liyun Zhong
Summary: The synthesized Au/Ag composite-based SERS nanoprobe showed significant advantages in sensitivity and response speed for quantitative characterization of Cr3+ content. This nanoprobe might offer a new strategy for dynamic monitoring of Cr3+ content in human metabolism.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hajun Dang, Sung-Gyu Park, Yixuan Wu, Namhyun Choi, Jun-Yeong Yang, Seunghun Lee, Sang-Woo Joo, Lingxin Chen, Jaebum Choo
Summary: A novel approach is employed in this study to internalize AuNPs into nano-dimples through DNA hybridization, generating precise nanogaps and enhancing plasmonic effects, with the potential verified as a SERS-based biomedical diagnostic device.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Grzegorz Bubak, Karina Kwapiszewska, Tomasz Kalwarczyk, Krzysztof Bielec, Tomasz Andryszewski, Michalina Iwan, Szymon Bubak, Robert Holyst
Summary: This study utilized single-molecule fluorescent correlation spectroscopies to show that the motion of inert probes with diameters ranging from 2.6 to 150 nm is mostly unobstructed in the nucleus, indicating the presence of interchromosomal channels filled with diluted protein solution. These channels allow various cargos to migrate freely at the nanoscale.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Multidisciplinary Sciences
Lukasz Richter, Karolina Ksiezarczyk, Karolina Paszkowska, Marta Janczuk-Richter, Joanna Niedziolka-Jonsson, Jacek Gapinski, Marcin Los, Robert Holyst, Jan Paczesny
Summary: Hydrophobicity plays a critical role in the adsorption of molecules and objects on surfaces, with a wetting angle threshold of around 95 degrees. The addition of surfactant and plasma treatment can reduce virus adsorption, which is crucial for daily use of plastic containers in bio-laboratories and related research.
SCIENTIFIC REPORTS
(2021)
Article
Spectroscopy
Aneta Aniela Kowalska, Marta Czaplicka, Ariadna B. Nowicka, Krzysztof Nicinski, Aleksandra Piotrowska, Agnieszka Kaminska
Summary: A label-free method based on surface-enhanced Raman spectroscopy (SERS) using a silicon-based SERS platform was utilized to differentiate primary and secondary brain tumors with high accuracy. The study also found a correlation between IL-10 cytokine receptor and tumor grading.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Biophysics
Sylwia M. Berus, Monika Adamczyk-Poplawska, Beata Mlynarczyk-Bonikowska, Evelin Witkowska, Tomasz Szymborski, Jacek Waluk, Agnieszka Kaminska
Summary: The method of comprehensive SERSchemometric analysis of five bacterial pathogens responsible for sexually transmitted diseases showed high accuracy in identifying individual species within the Neisseria genus. This approach allows for simple and non-invasive analysis of clinical samples, with fast analysis time, culture-free identification, and sensitive and reliable SERS-based diagnosis of STDs.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Biochemistry & Molecular Biology
Anna Stankiewicz, Katarzyna Kaczorowska, Ryszard Bugno, Aneta Koziol, Maria H. Paluchowska, Grzegorz Burnat, Barbara Chruscicka, Paulina Chorobik, Piotr Branski, Joanna M. Wieronska, Beata Duszynska, Andrzej Pilc, Andrzej J. Bojarski
Summary: This study developed a group of 1,2,4-oxadiazole derivatives that exhibited positive allosteric modulatory activity on mGlu(4) receptors. These derivatives were selectively active on mGlu(7) and mGlu(8) receptors and showed anxiolytic- and antipsychotic-like properties.
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
(2022)
Article
Chemistry, Physical
J. L. Weyher, D. H. Van Dorp, T. Conard, G. Nowak, I. Levchenko, J. J. Kelly
Summary: Surface polarity plays a significant role in the chemical etching of GaN. Prior photoetching can cause the formation of nanocolumns and protrusions, which result in distinctive features depending on the crystal orientation and inhomogeneities presence.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Entomology
Krzysztof Miler, Daniel Stec, Laura Pardyak, Alicja Kaminska, Karolina Kuszewska
Summary: Some honeybee workers show high alcohol dehydrogenase (ADH) levels and high resistance to the sedative effects of alcohol, but the study found that the increased sedation latency in individuals after several ethanol encounters was not accompanied by detectibly increased ADH levels in such workers. This suggests that ethanol-induced ADH production may not be necessary for increased coping with alcohol inebriation.
PHYSIOLOGICAL ENTOMOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Aneta Aniela Kowalska, Marta Czaplicka, Ariadna B. Nowicka, Izabela Chmielewska, Karolina Kedra, Tomasz Szymborski, Agnieszka Kaminska
Summary: This study demonstrates that the combination of surface-enhanced Raman spectroscopy (SERS) technique and partial least squares analysis can serve as a potential tool for differentiating pleural effusion in cancerous diseases and for faster diagnosis of lung cancer. The results show high accuracy in distinguishing tumor and non-tumor samples, as well as differentiating between squamous cell and adenocarcinoma types.
Article
Chemistry, Physical
Tomasz Sochacki, Robert Kucharski, Karolina Grabianska, Jan L. Weyher, Malgorzata Iwinska, Michal Bockowski, Lutz Kirste
Summary: This paper presents a detailed investigation into the basic ammonothermal growth process of GaN, focusing on the crystallization on a native seed with an intentionally varying off-cut. The study aims to answer fundamental questions related to the crystallographic planes, growth rates in different directions, and the influence of seed off-cut. Various characterization methods were employed, leading to the creation of a growth model for ammonothermal GaN crystal. The findings contribute to a better understanding of the basic crystal growth process of GaN using the ammonothermal method.
Article
Chemistry, Physical
Lutz Kirste, Thu Nhi Tran Thi Caliste, Jan L. Weyher, Julita Smalc-Koziorowska, Magdalena A. Zajac, Robert Kucharski, Tomasz Sochacki, Karolina Grabianska, Malgorzata Iwinska, Carsten Detlefs, Andreas N. Danilewsky, Michal Bockowski, Jose Baruchel
Summary: In this paper, a new type of extended defect in ammonothermally grown gallium nitride (GaN) single crystals, called hexagonal honeycomb shaped dislocation bundles, is investigated using X-ray Bragg diffraction imaging and defect selective etching. These dislocation bundles are either grouped in specific areas to form limited subgrain boundaries or aligned in straight long chains. The lattice distortions associated with these dislocation bundles are extensively measured to provide clues about their origin.
Article
Chemistry, Analytical
Tomasz R. Szymborski, Marta Czaplicka, Ariadna B. Nowicka, Joanna Trzcinska-Danielewicz, Agnieszka Girstun, Agnieszka Kaminska
Summary: This study demonstrates a unique arrangement of surface-enhanced Raman spectroscopy (SERS) technique and dielectrophoretic effect for the detection of freely circulating cancer cells (CTCs). The combination of SERS and dielectrophoresis allows for efficient deposition of CTCs on the SERS platform. The developed approach shows a limit of detection (LOD) of 20 cells/mL, highlighting its clinical potential and usefulness.
Article
Engineering, Electrical & Electronic
J. L. Weyher, A. Tiberj, G. Nowak, J. C. Culbertson, J. A. Freitas Jr
Summary: To control the electrical properties of SiC, it is important to understand the nature and properties of extended defects. In this study, traditional defect-selective etching and photo-etching methods were used to identify typical and new structural defects in commercial SiC wafers. The etch rate in photo-etching increases as the free carrier concentration decreases, allowing for more precise estimation of the carrier concentration.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Physics, Multidisciplinary
Robert Holyst, Karol Makuch, Konrad Gizynski, Anna Maciolek, Pawel J. Zuk
Summary: This paper investigates the extension of equilibrium thermodynamics to nonequilibrium systems in steady states, and whether such a description exists for the van der Waals gas in a heat flow. The study shows that the internal energy in nonequilibrium states has the same form as in equilibrium thermodynamics, and the steady-state fundamental equation leads to the thermodynamic Maxwell relations for measurable properties.
Article
Chemistry, Multidisciplinary
Aleksandra Michalowska, Aleksandra Gajda, Agata Kowalczyk, Jan L. L. Weyher, Anna M. M. Nowicka, Andrzej Kudelski
Summary: The structure of chemisorbed layer on nanostructured GaN was determined using surface-enhanced Raman scattering (SERS) measurements. Hybridization of target single-stranded DNA with immobilized capture HS-ssDNA induced conformational changes in the chains of alkanethiol and mercaptohexan-1-ol. Silver substrates showed greater potential for observing these hybridization-induced rearrangements compared to gold substrates.
Article
Physics, Fluids & Plasmas
Yirui Zhang, Marek Litniewski, Karol Makuch, Pawel J. Zuk, Anna Maciolek, Robert Holyst
Summary: The study reveals an out-of-equilibrium transition in an ideal gas, where supplying energy directly into the system triggers a continuous transition to a state with low-density hot gas on one side of the inner wall and dense cold gas on the other side at critical heat flux. Molecular dynamic simulations confirm this transition, while the introduction of a Helmholtz-like function helps determine the stable positions of the internal wall in the system.
