Article
Biochemistry & Molecular Biology
Penparapa Chanphai, Gervais Berube, Heidar-Ali Tajmir-Riahi
Summary: This study investigated the conjugation of chitosan with anticancer drugs and found that both hydrophobic and hydrophilic contacts are involved in drug-polymer interactions, with chitosan size and charge playing a major role in complex stability. The results also showed that cis-Pt forms more stable complexes than trans-Pt, and chitosan 100 has a stronger binding ability compared to chitosan 15.
Article
Chemistry, Multidisciplinary
Nan Wang, Wei Zhao, Miaolei Zhang, Pengfei Cao, Shengjun Sun, Houyi Ma, Meng Lin
Summary: Bismuth was introduced as an intermediate in the production of Au-X bimetallic nanoalloys through the galvanic replacement reaction. The resulting Au-X nanoalloys exhibited good activity for electrocatalytic reactions in alkaline media, providing an option for the formation of multimetal nanoalloys with similar electrochemical potentials and compositions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Mohammed K. Abdel-Rahman, Patrick M. Eckhert, D. Howard Fairbrother
Summary: Ion-beam-induced deposition using Me3PtCpMe was studied through a combination of UHV surface science research and SEM data. The experiments showed that ion-induced deposition reaction cross sections are approximately two orders of magnitude greater, resulting in deposits with PtC5 stoichiometry. Ion-induced deposition also led to bimolecular methyl radical coupling to produce ethane.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Vamakshi Yadav, Soojin Jeong, Xingchen Ye, Christina W. Li
Summary: In this study, the extent of galvanic replacement reactions between Ag-0 nanoparticles and Pd, Pt, and Au ions was tuned through tailored complexation of metal cations with organic amine and phosphine ligands. This synthetic method serves as a general strategy to synthesize bimetallic Ag@AgM or Ag@M (M = Pd, Pt, Au) core-shell nanoparticles and exhibits good mass-activity in the electrocatalytic hydrogen evolution reaction.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kecheng Wei, Honghong Lin, Xueru Zhao, Zhonglong Zhao, Nebojsa Marinkovic, Michael Morales, Zhennan Huang, Laura Perlmutter, Huanqin Guan, Cooro Harris, Miaofang Chi, Gang Lu, Kotaro Sasaki, Shouheng Sun
Summary: Efficient cleavage of C-C bonds and oxidation of alcohols to CO2 is crucial for the development of highly efficient alcohol fuel cells. In this work, core/shell Au/Pt nanowires with stepped Pt clusters deposited on ultra-thin Au nanowires are synthesized as an active catalyst for alcohol oxidation. The Au-1.0/Pt-0.2 nanowires show the highest activity for ethanol electro-oxidation and also exhibit activity for other primary alcohols. The study provides important evidence and insights for enhancing electrochemical oxidation of alcohols and future development of direct alcohol fuel cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Maicol Cipriani, Styrmir Svavarsson, Filipe Ferreira da Silva, Hang Lu, Lisa McElwee-White, Oddur Ingolfsson
Summary: Platinum coordination complexes are widely used as chemotherapeutic anticancer drugs and precursors in focused electron beam induced deposition. This study investigates the role of low-energy electrons in the fragmentation pathways of Pt(II) coordination compounds, highlighting the dominance of dissociative electron attachment in CO loss with low-energy electrons.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Lina Su, Pengfei Wang, Junhui Wang, Dongpeng Zhang, Haitao Wang, Yi Li, Sihui Zhan, Jinlong Gong
Summary: By incorporating abundant Cu dopants in ZnIn2S4 nanosheets, a single-atom Pt catalyst has been achieved; The Pt-Cu interaction provides an extra coordination site, making the single atom more stable on the surface; Additionally, Pt-Cu interaction serves as an efficient channel for electron transfer, enhancing charge separation and transfer efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Thomas P. Fay
Summary: This study investigates the impact of chirality on spin during electron transfer, finding that chirality combined with spin-orbit coupling does not lead to spin polarization, but instead generates quantum coherence between spin states.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Min Huang, Xian Wang, Guanjie Xing, Chenchen Meng, Yunchao Li, Xiaohong Li, Louzhen Fan, Yan Wan, Shihe Yang
Summary: This study demonstrates the enhanced oxygen evolution reaction (OER) by CuS nanodisks (NDs) under illumination, achieved by generating abundant hot holes through localized surface plasmon resonance (LSPR) damping. This marks the first report on direct utilization of plasmonic hot holes in CuS nanomaterials to boost OER performance, providing a new pathway for designing NIR-active photocatalysts/electrocatalysts based on unique LSPR properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Energy & Fuels
Sonali Panigrahy, Rajib Samanta, Prajnashree Panda, Ranjit Mishra, Sudip Barman
Summary: Interfaces-engineered RuO2-Pt/C, as a pH-independent catalyst, shows superior activity and stability for Hydrogen oxidation reaction/Hydrogen evolution reaction applications compared to commercial Pt/C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Heeyoung Kim, Hyewon Park, Mincheol Kang, Jeong Young Park
Summary: Plasmonic photoelectrochemical (PEC) water splitting has attracted great interest due to its ability to overcome the limitations of semiconductors in terms of light absorption. In this study, a Pt/Ag/TiO2 metal-semiconductor Schottky nanodiode was designed and fabricated as a photoanode to investigate the role of plasmonic hot carriers in plasmonic water splitting. By combining the designed PEC cell system with the nanodiode, it was demonstrated that the plasmonic hot carriers from Ag played a decisive role in the enhancement of photocatalytic efficiency by contributing to the oxygen evolution reaction.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Petra Martinovic, Markus Rohdenburg, Aleksandra Butrymowicz, Selma Sarigul, Paula Huth, Reinhard Denecke, Iwona B. Szymanska, Petra Swiderek
Summary: The study demonstrates that the performance of different Ag(I) complexes in FEBID critically depends on their molecular structure, with Ag(I) carboxylates containing aliphatic side chains being particularly favorable for FEBID.
Article
Chemistry, Multidisciplinary
Weijian Gao, Caixia Kan, Shanlin Ke, Qinru Yun, Xingzhong Zhu, Xiaoguang Zhu
Summary: In this study, a novel Au-Pt@TiO2 nanocomposite was synthesized, featuring strong localized electric field enhancement and energy transfer to facilitate carrier separation, resulting in improved photocatalytic performance and durability. The nanoboxes with nanocavities effectively manage the usage of localized energy and provide space for reaction, making it a promising candidate in pollutant degradation and chemical reaction catalysis.
NANOSCALE ADVANCES
(2021)
Article
Physics, Applied
Kakeru Ujimoto, Hiroki Sameshima, Kentaro Toyoki, Yoshinori Kotani, Takahiro Moriyama, Kohji Nakamura, Ryoichi Nakatani, Yu Shiratsuchi
Summary: In this paper, we studied the magnetic response of boundary magnetization in the Pt/magnetoelectric Cr2O3/Pt epitaxial trilayer using AHE and XMCD. We found that the film exhibited magnetic responsiveness when the Cr2O3 thickness was reduced to 15 nm, manifested as rectangular hysteresis in AHE's magnetic field dependence. XMCD intensity and its rectangular magnetic field dependence confirmed that the magnetic response was attributed to the interfacial Cr moment. Further investigation revealed that the reversal process of boundary magnetization was dominated by domain wall motion, directly visualized by scanning XMCD microscope.
APPLIED PHYSICS LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Danye Liu, Niuwa Yang, Qing Zeng, Hui Liu, Dong Chen, Penglei Cui, Lin Xu, Chaoquan Hu, Jun Yang
Summary: This review focuses on heterogeneous nanostructures derived from core-shell Ag-Pt nanoparticles, highlighting their application in electrochemical reactions and enhanced catalytic properties. The potential for preparing more heterogeneous nanostructures using core-shell Ag-Pt particles or their derivatives is discussed, offering opportunities and challenges in the field.
CHINESE CHEMICAL LETTERS
(2021)
Article
Materials Science, Coatings & Films
Bryan G. Salazar, Hanwen Liu, Amy Walker, Lisa McElwee-White
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2020)
Editorial Material
Chemistry, Physical
Raffaella Buonsanti, Jillian M. Buriak, Laura Cabana, Brandi M. Cossairt, Mita Dasog, Stefanie Dehnen, Jillian L. Dempsey, Andrews Nirmala Grace, Dorota Koziej, Lisa McElwee-White, Christine Thomas, Jenny Y. Yang
CHEMISTRY OF MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Jo-Chi Yu, Mohammed K. Abdel-Rahman, D. Howard Fairbrother, Lisa McElwee-White
Summary: FEBID and FIBID are direct-write fabrication techniques using focused beams of charged particles. Ultra high vacuum surface science studies provide mechanistic information on electron and ion-induced processes, aiding in the design of custom precursors for these techniques. Minimizing contamination in nanostructures is crucial for many applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Christopher R. Brewer, Nicholas C. Sheehan, Jessica Herrera, Amy Walker, Lisa McElwee-White
Summary: Solution phase photochemical experiments showed that (eta 4-diene)-Ru(CO)3 complexes can be used as precursors for photoassisted chemical vapor deposition of ruthenium by losing both diene and CO ligands. The quantum yields of ligand loss were found to depend on the structure of the diene, and subsequent ligand loss was determined to occur from secondary photolysis. The compounds exhibited little luminescence, indicating that radiative decay of the excited states was not competitive with photochemical ligand loss. Additionally, the formation of colloidal Ru species was observed after irradiation in hydrocarbon solutions in the absence of phosphite.
Article
Nanoscience & Nanotechnology
Elif Bilgilisoy, Jo-Chi Yu, Christian Preischl, Lisa McElwee-White, Hans-Peter Steinrueck, Hubertus Marbach
Summary: The precise deposition of nanoscaled structures is crucial for nanomaterial applications. This study successfully fabricated clean and well-defined Ru nanomaterials using highly focused electron beam-induced deposition. The study found that the deposition process competed with the electron-induced etching, resulting in lower Ru content initially. However, with increasing electron doses, the Ru content increased and the etching process became less pronounced. This research expands the possibilities of engineering nanostructured materials.
ACS APPLIED NANO MATERIALS
(2022)
Editorial Material
Chemistry, Inorganic & Nuclear
Rakeshwar Bandichhor, A. S. Borovik, Martin D. Eastgate, Nora S. Radu, Feng Shi, Lisa McElwee-White
INORGANIC CHEMISTRY
(2023)
Editorial Material
Chemistry, Organic
Rakeshwar Bandichhor, A. S. Borovik, Ana de Bettencourt-Dias, Martin D. Eastgate, Nora S. Radu, Feng Shi, Lisa McElwee-White
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Editorial Material
Chemistry, Organic
Rakeshwar Bandichhor, A. S. Borovik, Ana de Bettencourt-Dias, Martin D. Eastgate, Nora S. Radu, Feng Shi, Lisa McElwee-White
Editorial Material
Chemistry, Applied
Rakeshwar Bandichhor, A. S. Borovik, Ana de Bettencourt-Dias, Martin D. Eastgate, Nora S. Radu, Feng Shi, Lisa McElwee-White
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2023)
Editorial Material
Chemistry, Inorganic & Nuclear
Rakeshwar Bandichhor, A. S. Borovik, Ana de Bettencourt-Dias, Martin D. Eastgate, Nora S. Radu, Feng Shi, Lisa McElwee-White
Article
Nanoscience & Nanotechnology
Ian M. Germaine, Mary B. Huttel, Molly P. Alderman, Lisa McElwee-White
Summary: Comparisons were made between aerosol-assisted chemical vapor deposition of MoS2 films from solutions containing single-source precursors and coreactant solution, indicating the significance of ligand precoordination on film properties. Raman spectra and GI-XRD patterns showed that the single-source precursors resulted in more intense and sharper signals for 2H-MoS2, suggesting improved crystallinity. SEM and XPS analysis were also conducted to evaluate morphology and composition. Thermolysis of the single-source precursors indicated the generation of a terminal sulfido on the molybdenum center with loss of a heteroatom stabilized carbene.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Thomas E. Shaw, Zahra Ali, Taylor M. Currie, S. Novia Berriel, Brian Butkus, J. Tyler Wagner, Konstantin Preradovic, Glenn P. A. Yap, Jennifer C. Green, Parag Banerjee, Alfred P. Sattelberger, Lisa McElwee-White, Titel Jurca
Summary: The synthesis, characterization, and thermogravimetric analysis of tris(N,N'-di-isopropylacetamidinate)molybdenum(III) (Mo(iPr-AMD)(3)) are reported. Mo(iPr-AMD)(3) is a rare example of a homoleptic mononuclear complex of molybdenum(III) and fills a longstanding gap in the literature of transition metal(III) trisamidinate complexes. Thermogravimetric analysis reveals excellent volatilization at elevated temperatures, indicating potential applications as a precursor for vapor phase deposition of Mo-based materials. The potential of Mo(iPr-AMD)(3) as a stable, high-temperature precursor for both chemical vapor deposition (CVD) and atomic layer deposition (ALD) processes is demonstrated. Overall, a rating of 8 out of 10 is given to this article.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Ali Kamali, Will G. Carden, Jodie V. Johnson, Lisa McElwee-White, O. Ingolfsson
Summary: Appreciable effort is being made to design suitable organometallic precursors for metallic nanostructure fabrication using focused electron beam induced deposition (FEBID), which has great potential for 3D patterning. The initial interaction of the potential precursor with low energy electrons is crucial for determining the composition of the resulting deposits. This study explores the low energy electron-induced fragmentation of CF3AuCNC(CH3)(3) in the gas phase and compares it with the composition of deposits formed under FEBID conditions.
EUROPEAN PHYSICAL JOURNAL D
(2023)
Article
Chemistry, Inorganic & Nuclear
Saleh Muhammad, Erik T. Ferenczy, Ian M. Germaine, J. Tyler Wagner, Muhammad T. Jan, Lisa McElwee-White
Summary: In this study, Tetrakis(dithiocarboxylato)molybdenum(iv) complexes were synthesized and characterized as precursors for the aerosol assisted chemical vapor deposition (AACVD) of MoS2 thin films. The thermal behavior of the complexes was suitable for AACVD, and MoS2 thin films were successfully grown using Mo(S2CMe)(4) as a precursor in toluene solution. The films exhibited a 2H-MoS2 structure with vertically oriented morphology and a thickness of 2.54 μm, which was confirmed by various characterization techniques including GIXRD, XPS, EDS, and FE-SEM. The Raman E-2g(1) and A(1g) vibrational modes of crystalline 2H-MoS2 were also observed.
DALTON TRANSACTIONS
(2022)
Article
Biochemistry & Molecular Biology
Maicol Cipriani, Styrmir Svavarsson, Filipe Ferreira da Silva, Hang Lu, Lisa McElwee-White, Oddur Ingolfsson
Summary: Platinum coordination complexes are widely used as chemotherapeutic anticancer drugs and precursors in focused electron beam induced deposition. This study investigates the role of low-energy electrons in the fragmentation pathways of Pt(II) coordination compounds, highlighting the dominance of dissociative electron attachment in CO loss with low-energy electrons.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)