Article
Chemistry, Physical
Jee Hyeon Kim, Chaehyeon Ahn, Jong-Guk Ahn, Younghee Park, Soyoung Kim, Daehyun Kim, Jaeyoon Baik, Jaehoon Jung, Hyunseob Lim
Summary: By using WOCl4 as a vapor phase precursor, the growth of homogeneous WS2 monolayer can be achieved through precise control of partial pressure during chemical vapor deposition. The carbon-free composition of WOCl4 reduces the contamination of amorphous carbon. Investigating the thermodynamics of growth parameters helps to understand the optimum growth conditions of WS2 monolayer.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Elif Bilgilisoy, Rachel M. Thorman, Michael S. Barclay, Hubertus Marbach, D. Howard Fairbrother
Summary: By utilizing in situ X-ray photoelectron spectroscopy (XPS), the effects of low energy electrons and Ar+ ions on Fe(CO)(5) thin films were studied. Both electron and ion irradiation caused the precursor molecules to decompose through sequential surface reactions, leading to the formation of unique reaction products.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Min Choi, Seon Kyeong Kang, Sanghyeon Kim, Su Jin Kim, Gwang Hwi An, So Jeong Shin, Dohyun Kim, Ikhwan Nur Rahman, Junhyeok Bang, Kyungwan Kim, Dong-Hyun Kim, Hyun Seok Lee
Summary: In this study, Mo nitride and carbonitride thin films were synthesized by nitriding and carbonitriding of MoO3 films using ammonium salt precursors in the chemical vapor deposition process. The optimized metallic phase transition resulted in films with the lowest electrical resistivity.
CURRENT APPLIED PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
E. Ermakova, M. Kosinova
Summary: Silicon carbonitride (SiCN) films have attracted considerable interest due to their outstanding characteristics, and the composition and properties of the films can be changed by tailoring the deposition approach and synthesis conditions. This review provides a detailed overview of the deposition process of SiCN films using volatile organosilicon compounds as single-source precursors, and discusses the correlations between the chemical structure and properties of the films.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Pin-Ru Chen, Hsuan-Wei Fu, Shu-Meng Yang, Kuo-Chang Lu
Summary: This study reports on the formation of high-crystallinity manganese-doped and potassium-doped tungsten oxide nanowires through chemical vapor deposition (CVD), and characterizes their properties and performance. The doping improves the catalytic efficiency and gas sensing response of the tungsten oxide nanowires.
Article
Materials Science, Multidisciplinary
Minyu Bai, Shuai Wen, Jijie Zhao, Yuxuan Du, Fei Xie, Huan Liu
Summary: In the study of the CVD process of 2D MoS2 crystals, different carrier gas flow fields were explored. It was found that adjusting the local carrier gas flow field could achieve the appropriate precursor vapor concentration, leading to the growth of single 2D MoS2 crystals and a higher coating rate on the target substrate surface. The carrier gas flow also played a role in the growth of the 2D MoS2 crystals.
Article
Chemistry, Multidisciplinary
Meruyert Nazhipkyzy, Renata R. Nemkayeva, Araylim Nurgain, Aigerim R. Seitkazinova, Balaussa K. Dinistanova, Almagul T. Issanbekova, Nurzhamal Zhylybayeva, Nurgul S. Bergeneva, Gulnar U. Mamatova
Summary: This article investigates the synthesis of multiwalled carbon nanotubes on the surface of diatomite mineral using a chemical vapor deposition method. The effects of catalyst concentration and synthesis temperature on the formation and morphology of carbon nanotubes are studied. Diatomite, chosen as a catalyst carrier due to its elemental composition, consists mainly of amorphous silica, quartz, and various metals.
Article
Nanoscience & Nanotechnology
Aanchal Alagh, Fatima Ezahra Annanouch, Ayrton Sierra-Castillo, Emile Haye, Jean-Francois Colomer, Eduard Llobet
Summary: In this study, a chemoresistive-type gas sensor composed of two-dimensional WSe2 was fabricated for the first time. The sensor showed dual selectivity towards NH3 and NO2 gases, with the selectivity tunable by adjusting the operating temperature. At moderate temperatures, the sensor exhibited stable and reproducible responses towards NH3 vapor detection, and high sensitivity towards NO2 molecules even at room temperature. The sensor also demonstrated high resilience against ambient humidity, making it suitable for NH3 gas detection in various environments.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Han-Yin Liu, Yu-Jie Liao, Hung-Yi Wu
Summary: This study investigates the deposition of InSnZnO thin films using mist chemical vapor deposition with different nitrogen/oxygen ratios of carrier gases. The results show that using nitrogen as the carrier gas leads to the highest field-effect mobility, and using a mixed nitrogen/oxygen carrier gas improves the electrical characteristics of the films.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hirokazu Katsui, Kazuya Shimoda, Mikinori Hotta
Summary: This study successfully prepared high hardness and low modulus silicon carbide and tantalum carbonitride composite films using laser-assisted chemical vapor deposition. The effects of deposition temperature on the properties of the films were investigated, and it was found that the film prepared at 1100 degrees C exhibited reduced Young's modulus and high hardness. The SiC-TaCN nanocomposite film also showed superior durability in erosion tests.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Diane Samelor, Asiya Turgambaeva, Vladislav Krisyuk, Adeline Miquelot, Jeremy Cure, Sergey Sysoev, Sergey Trubin, Pavel Stabnikov, Jerome Esvan, Vassilios Constandoudis, Constantin Vahlas
Summary: The study investigated the use of two solid precursors for the chemical vapor deposition of TiO2 films, revealing differences in film structure and photocatalytic performance between the two precursors.
Article
Materials Science, Multidisciplinary
Liqin Su, Yifei Yu, Linyou Cao, Yong Zhang
Summary: This study systematically characterized the inhomogeneity of strain, doping, and defects in CVD-grown WS2 monolayers and revealed the effects of different regions on the properties. It was found that the inhomogeneity substantially diminished in continuous films.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
S. V. Sysoev, V. S. Sulyaeva, M. L. Kosinova
Summary: Tensimetric studies were conducted to determine temperature-dependent saturated vapor pressures and thermodynamic characteristics of vaporization for R3N center dot BH3 (R = Me or Et) alkylamine boranes. These compounds can be used as precursors in vapor deposition processes to produce films of the B-C-N system. The synthesis of boron carbonitride films using triethylamine borane (TEAB) at different temperatures was performed, and the resulting films were characterized.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Lianqing Yu, Yankun Wang, Jinhui Wang, Xingyu Zhao, Wei Xing, Liana Alvares Rodrigues, D. Amaranatha Reddy, Yaping Zhang, Haifeng Zhu
Summary: Efficient copper phthalocyanine gas sensors with sensitive and selective analysis capabilities for toxic gases at room temperature have shown great potential in recent years. In this study, a gas sensor based on copper phthalocyanine (CuPc) was prepared using a low-temperature physical vapor deposition (PVD) method. The uniform cotton-wool nanowires film had high yield and easy peel-off properties. The PVD preparation temperature significantly affected the recovery and cyclic properties of the gas sensor for chlorine. The high-performance CuPc nanowires prepared at 230 degrees C had the lowest detection limit and a much faster recovery time compared to previous results. Additionally, it exhibited excellent light-induced gas-sensitive characteristics to Cl-2 at room temperature. This sensor has potential applications in photo-gas sensors, photocatalytic devices, or photoelectric devices.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Huanhuan Bai, Tyler L. Maxwell, Martin E. Kordesch, T. John Balk
Summary: Nanoscale particles of tungsten were produced using physical vapor deposition and deposited on sapphire substrates. The annealed tungsten particles were found to have a nonuniform island-like structure and transformed into highly faceted nanoparticles after pre-heating at an intermediate temperature followed by annealing at 1100 degrees Celsius under a pressure of 10-7 Torr.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Inorganic & Nuclear
Nathan C. Ou, Konstantin Preradovic, Erik T. Ferenczy, Courtney B. Sparrow, Ian M. Germaine, Titel Jurca, Valentin Craciun, Lisa McElwee-White
Article
Chemistry, Physical
Rachel M. Thorman, Pernille A. Jensen, Jo-Chi Yu, Scott J. Matsuda, Lisa McElwee-White, Oddur Ingolfsson, D. Howard Fairbrother
JOURNAL OF PHYSICAL CHEMISTRY C
(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)