Article
Materials Science, Multidisciplinary
Yuzhou Fu, Mingyang Xin, Ju Chong, Ruoping Li, Mingju Huang
Summary: Formaldehyde is a strong-smelling, colorless, excitant gas that is carcinogenic to humans. This study utilizes a method of growing ZIF-8 shell layers on gold nanostars to achieve extremely high sensitivity of SERS-active substrates to formaldehyde molecules, with the lowest detection level almost at parts per billion (ppb).
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Di Cheng, Yongqiang Zhou, Qianqian Wang, Xiang Zhang, Mengmeng Li, Yunqing Lu, Ji Xu, Lei Zhang, Jin Wang
Summary: Surface-enhanced Raman scattering (SERS) is a fascinating phenomenon that enhances the Raman signals of molecules by creating hot spots. In this study, a high-performance Ag/ZIF-8 SERS substrate is fabricated using a simple two-step method. Plasmonic nanogaps are created between the Ag nanocap and the Ag layer on the substrate, resulting in greatly enhanced electromagnetic (EM) field and preconcentration effect. The measurement results show high SERS enhancement factor, low detectable concentration, and low relative standard deviation, suggesting the potential of this substrate for molecular detection.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Guan-Ye Liao, Mei-Chin Lien, Sirimuvva Tadepalli, Keng-Ku Liu
Summary: Surface-enhanced Raman scattering (SERS) is a highly sensitive platform for chemical and biological sensing. Metal-organic frameworks (MOFs) and porous carbon nanostructures have recently received considerable attention as SERS substrates. In this study, a porous Au@Ag nanostructure-decorated MOF-derived nanoporous carbon (NPC) is demonstrated for highly efficient SERS sensing.
Article
Materials Science, Multidisciplinary
Charlynn Sher Lin Koh, Howard Yi Fan Sim, Shi Xuan Leong, Siew Kheng Boong, Carice Chong, Xing Yi Ling
Summary: It has been shown that combining porous metal-organic frameworks (MOFs) with plasmonic nanoparticles (NPs) can create plasmonic NP-MOF nanohybrids with additional functionalities, where the strengths of each material complement each other, leading to wider applications.
ACS MATERIALS LETTERS
(2021)
Article
Chemistry, Physical
Sunghee Lee, Jungwoo Kim, Kyungnae Baek, Nam Hoon Kim, Jerome K. Hyun, So-Jung Park, Haemi Lee
Summary: A bimodal imaging method was developed to spatially resolve and correlate SERS and Mie scattering signals. By examining different types of nanoparticle assemblies, distinct behaviors between intra- and interparticle nanogaps were observed. The study demonstrated the potential of this dual-imaging approach for improving the reliability of SERS measurements.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Xin Xie, Nan Gao, Yingzhou Huang, Yurui Fang
Summary: Benefiting from the electromagnetic enhancement of noble metal nanoparticles (NPs) and the capture ability of organic frameworks, plasmonic metal-organic framework (MOF) structures have greatly promoted the development of gas detection by surface enhanced Raman spectroscopy (SERS). In this work, the kinetic processes of gaseous thiophenol compounds (TPC) in the plasmonic Zeolitic Imidazolate Framework (Ag@ZIF) core-shell NPs are studied by SERS spectra. The study reveals that SERS intensities of gaseous TPC can be enhanced in an H2 mixed gas environment with different functional groups of TPC, and the enhancement is influenced by the thicknesses of the MOF shell and the ambient mixed gas. Additionally, a molecular collision model is introduced to explain the distribution of gaseous TPC molecules in ZIF and the two-step enhancement of SERS intensities.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Yanping Sun, Tong Shu, Jianxin Ma, Qiong Dai, Peiwen Peng, Ziping Zhou, Xiang Zhou, Lei Su, Xueji Zhang
Summary: In this study, a general biosensing model utilizing enzymes, luminogens, and framework materials was developed to achieve highly selective glucose detection. The nanoprobes were embedded into hollow-out tapes for convenient glucose detection using a smartphone.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jie Liang, Weiwei Zhang, Jun Wang, Wanzhen Li, Fei Ge, Weihao Jin, Yugui Tao
Summary: A novel nanocatalytic platform CaO2@DOX@Cu/ZIF-8 was prepared, which enabled the combination of chemotherapy and chemodynamic therapy (CDT) in cancer cells. In the tumor microenvironment, CaO2@DOX@Cu/ZIF-8 NPs rapidly disintegrated to release CaO2, generating H2O2 and O-2. The combination of chemotherapy and CDT using CaO2@DOX@Cu/ZIF-8 NPs showed a more favorable tumor suppression effect compared to the nanomaterial precursors.
Article
Chemistry, Multidisciplinary
Amir Afarinandeh, Kambiz Heidari, Mariusz Barczak, Magda H. Abdellattif, Zahra Izadi Yazdanaabadi, Ali Akbar Mohammadi, Gholam Ali Haghighat, Mahmoud Shams
Summary: As an emerging class of nanoporous materials, Metal Organic Framework (MOFs) have attracted attention for their advantages in environmental remediation. ZIFs and Ni-MOF were chosen as fluoride (F-) scavengers due to their robust structures and straightforward synthesis routes. The relationship between F- adsorption and the geometry and structural properties of ZIFs was studied. Using the Box-Behnken design (BBD), the key operating variables such as pH, mixing time, F -concentration, and ZIF-67-NO3 dose were modeled. Optimization of the model achieved a maximum 85.9% F- removal under specific conditions.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiaolu Wang, Ninghua Fu, Jin-Cheng Liu, Ke Yu, Zhi Li, Zhongfei Xu, Xiao Liang, Peng Zhu, Chenliang Ye, Awu Zhou, Ang Li, Lirong Zheng, Li-Min Liu, Chen Chen, Dingsheng Wang, Qing Peng, Yadong Li
Summary: Exploring the transformation pathways of metal catalysts is crucial for the development of high efficiency catalysts. This study presents a novel solid-state atomic replacement transformation method, which successfully exchanges metal atoms between single atoms and nanoalloys, leading to enhanced catalytic performance in CO2 reduction reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Spectroscopy
Xiangxin Xue, Lei Chen, Cuimei Zhao, Yu Qiao, Jing Wang, Jinghui Shi, Yanan Lin, Limin Chang
Summary: In this work, a F-doped SnO2/Ag/zeolite imidazole framework (FTO/Ag/ZIF-8) sandwich structure was successfully fabricated via a magnetic sputtering method and used as a surface-enhanced Raman scattering (SERS) substrate. The sputtering time of Ag nanoparticles (NPs) was adjusted to achieve optimal SERS performance. The electromagnetic mechanism (EM) and charge-transfer (CT) enhancement mechanism synergistically contributed to the SERS phenomenon in the system.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Pu Wu, Qiuzheng Du, Li Chen, Manli Yang, Yiyang Sun, Hao Zhi, Pierre Dramou, Hua He
Summary: The newly synthesized MOF@MOF compound (NUZ-8) composed of NH2-UiO-66 and ZIF-8 with the structure modifier PVP showed unique polyhedron shape, high specific surface area, and excellent fluorescence properties. NUZ-8, used as a probe for the rapid optical detection of QCT, demonstrated outstanding selectivity and sensitivity, with wide linear range, low detection limit, and acceptable recoveries in red wine samples. This polyhedral composite provides guidance for enhancing chemical sensing and instant determination of drugs using IEGM.
Article
Optics
Da-Jie Yang, Si-Jing Ding, Liang Ma, Qing-Xia Mu, Qu-Quan Wang
Summary: This study reveals the nature of recently reported plasmon modes by introducing the concept of SPP standing waves and an analytical model. The study systematically analyzes SPP standing waves within various nanocavities and explains some unusual phenomena. The research has significant implications for a comprehensive understanding and application of cavity plasmons in ultrasensitive bio-sensings.
Article
Multidisciplinary Sciences
Alireza Baghban, Hossein Ezedin Nejadian, Sajjad Habibzadeh, Farzin Zokaee Ashtiani
Summary: In this study, new nanostructure catalysts derived from ZIF-8 and ZIF-67 were used to hydrogenate pyrolysis gasoline, and CoNi/NC catalyst showed superior performance. Catalysts without carbonization process showed no conversion in the hydrogenation process. These synthesized catalysts can compete with expensive Pt or Pd-based hydrogenation catalysts due to their high surface area and great electronic properties.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Xiaohui Niu, Simeng Yan, Rui Zhao, Hongxia Li, Xiaoyu Liu, Kunjie Wang
Summary: In the pursuit of chiral materials with significant chiral recognition effects and stability, the integration of metal nanoparticles and chiral metal-organic frameworks (CMOFs) has shown promise. However, the combination of metal nanoparticles (MNPs)/CMOFs often suffer from inferior stabilities due to the detachment of MNPs under certain conditions. To overcome this, a novel sandwich chiral material (D-His-ZIF-8@ Au@ZIF-8) was synthesized, which demonstrated excellent chiral recognition capabilities. This experiment presents a new perspective for the fabrication of a chiral electrochemical sensing platform based on a solid sandwich chiral nanocomposite.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Bing Ni, Mikhail Mychinko, Sergio Gomez-Grana, Jordi Morales-Vidal, Manuel Obelleiro-Liz, Wouter Heyvaert, David Vila-Liarte, Xiaolu Zhuo, Wiebke Albrecht, Guangchao Zheng, Guillermo Gonzalez-Rubio, Jose M. Taboada, Fernando Obelleiro, Nuria Lopez, Jorge Perez-Juste, Isabel Pastoriza-Santos, Helmut Coelfen, Sara Bals, Luis M. Liz-Marzan
Summary: A chiral growth method using cysteine as a dissymmetry inducer was developed to prepare gold nanorods with twisted morphology. Electron microscopy analysis suggests that the dissymmetry is caused by the development of chiral facets on the initial nanorods, resulting in a twisted shape. Cysteine plays a crucial role in assisting the enantioselective facet evolution, leading to the formation of highly chiral morphology with significant plasmonic optical activity.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Enke Feng, Guangchao Zheng, Xue Li, Mengzhen Zhang, Xiaoqin Li, Xinning Han, Linan Cao, Zhiqiang Wu
Summary: This study introduces PEDOT:PSS and ZB into the PAA network to construct a multipurpose hydrogel with excellent stretchability, tensile strength, freeze-tolerance, and solvent-resistant capability. Based on this hydrogel, a strain sensor with multi-environmental stability is fabricated, which can accurately monitor human motions and mechanical deformations in various solvent media and harsh climatic condition. Additionally, a flexible tube-shaped hydrogel is developed for liquid transportation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Analytical
Paulo S. S. Dos Santos, Joao P. Mendes, Bernardo Dias, Jorge Perez-Juste, Jose M. M. M. De Almeida, Isabel Pastoriza-Santos, Luis C. C. Coelho
Summary: Biochemical-chemical sensing with plasmonic sensors can be improved by analyzing spectral features other than surface plasmonic resonance peaks. In this study, the methodologies for enhancing sensitivity and resolution of gold or silver nanoparticle-doped optical fibers and gold or silver thin film-coated optical fibers are explored and expanded. Experimental and numerical results show consistent resolution improvements for both types of plasmonic fibers, indicating that this analysis can enhance sensing resolution of any plasmonic optical fiber sensors.
Article
Chemistry, Multidisciplinary
Xing Liu, Yanli Du, Shenli Wang, Yu Huang, Yongzhi Tian, Daniel Garcia-Lojo, Ignacio Perez-Juste, Jorge Perez-Juste, Isabel Pastoriza-Santos, Guangchao Zheng
Summary: This article investigates the synthesis of chiral cobalt oxide nanoparticles mediated by histidine and discovers their unique and tunable chiroptical properties. The analysis indicates that the ratio of Co2+/Co3+ and their interactions with the imidazole groups of histidine are behind their chiral properties. Furthermore, the study demonstrates the use of chiral cobalt oxide nanoparticles for the development of sensitive and enantioselective circular dichroism-based sensors.
Article
Materials Science, Multidisciplinary
Evgenii Vlasov, Alexander Skorikov, Ana Sanchez-Iglesias, Luis M. Liz-Marzan, Johan Verbeeck, Sara Bals
Summary: Electron tomography (ET) is a powerful tool for determining the 3D structure of nanomaterials, but it is time-consuming. Surface-sensitive secondary electron (SE) imaging, using the SE electron beam induced current (SEEBIC) technique, is proposed as an alternative to ET for studying nanomaterial morphology. SEEBIC imaging provides valuable information with high spatial resolution and shorter throughput times compared to ET. The contrast formation mechanisms that aid in interpreting SEEBIC data are also discussed.
ACS MATERIALS LETTERS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Warren C. W. Chan, Natalie Artzi, Chunying Chen, Xiaodong Chen, Dean Ho, Tony Hu, Kazunori Kataoka, Luis M. Liz-Marzan, Rahmi Oklu, Wolfgang J. Parak
Article
Chemistry, Physical
Xiaolu Zhuo, David Vila-Liarte, Shengyan Wang, Dorleta Jimenez de Aberasturi, Luis M. Liz-Marzan
Summary: A study on the stability of chiral gold nanorods (Au NRs) covered by different protecting shells was conducted. The findings can be applied to other chiral plasmonic nanoparticles and address concerns of instability in various applications.
CHEMISTRY OF MATERIALS
(2023)
Editorial Material
Chemistry, Physical
Galo J. A. A. Soler-Illia, Marco Faustini, Luis M. Liz-Marzan
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Jiaoyang Sa, Ningneng Hu, Wouter Heyvaert, Kyle Van Gordon, Hao Li, Le Wang, Sara Bals, Luis M. Liz-Marzan, Weihai Ni
Summary: Chiral ligands are necessary for the synthesis of dissymmetric plasmonic metal nanocrystals. However, chirality can also spontaneously evolve during the co-deposition of Au and Ag on Au nanorods. The presence of a specific Au/Ag ratio leads to phase segregation, forming an interface within the AuAg shell. Chirality is observed both at the Au-Ag interface and at the exposed surface of Au nanorods after Ag etching.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Ben Tadgell, Luis M. Liz-Marzan
Summary: Chiral plasmonic nanoparticles interact with biomolecules in distinct ways and can be probed using circular dichroism spectroscopy, offering potential advantages in biosensing and biomedical applications.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Jia-Qi Chen, Han-Bo Li, Xi Lu, Xiao-Yang Liu, Wei Feng, Pan Wang, Jian-Qiang Zhao, Zhen-Yu Zhu, Guang-Chao Zheng, Xiao-Chun Wu
Summary: This study demonstrates the synthesis of plasmonic nanoparticles (PNPs) with enhanced gap-enhanced Raman scattering (GERS) and plasmonic circular dichroism (PCD) signals. By modulating the growth process with thiol molecules, the researchers were able to achieve synergistic enhancement of GERS and PCD signals. The combination of 4-aminophenol and cysteine played roles as Raman reporter and chiral stimulus, respectively. The concentration of these molecules controlled the GERS and PCD signals, and also influenced the morphology of the PNPs.
Article
Materials Science, Multidisciplinary
Xuan-Ming Shen, Yuan Zhang, Shunping Zhang, Yao Zhang, Qiu-Shi Meng, Guangchao Zheng, Siyuan Lv, Luxia Wang, Roberto A. Boto, Chongxin Shan, Javier Aizpurua
Summary: In this paper, we develop a quantum master-equation theory to study the optomechanical effects in surface-enhanced resonant Raman scattering (SERRS) from a single molecule in a nanoparticle on mirror (NPoM) nanocavity. We use electromagnetic simulations and time-dependent density functional theory calculations to supplement the theory and study the SERRS of a methylene blue molecule in a realistic NPoM nanocavity. The simulations allow us to identify conditions for conventional optomechanical effects and discover distinct behaviors in SERRS.
Article
Chemistry, Multidisciplinary
Carla Estevez-Varela, Sara Nunez-Sanchez, Paula Pineiro-Varela, Dorleta Jimenez de Aberasturi, Luis M. Liz-Marzan, Jorge Perez-Juste, Isabel Pastoriza-Santos
Summary: Plexcitonic nanoparticles, which exhibit strong light-matter interactions, have been investigated using UV-visible and SERS spectroscopies, supported by FDTD calculations in this study. The combination of plasmonic nanomaterials and J-aggregates is found to be crucial, with the refractive index contrast between water and the TDBC shell playing a significant role in the observed SERS efficiency.
Article
Materials Science, Multidisciplinary
Jia-Qi Chen, Han-Bo Li, Xi Lu, Xiao-Yang Liu, Wei Feng, Pan Wang, Jian-Qiang Zhao, Zhen-Yu Zhu, Guang-Chao Zheng, Xiao-Chun Wu
Summary: A synthetic guideline to obtain PNPs with synergistically enhanced GERS and PCD signals through two-thiols-modulated growth has been demonstrated. These PNPs have potential applications in enantiomeric recognition, cancer therapy, and activation of the immune system.
