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1. Activation of the Si–B interelement bond related to catalysis

Author:
Feng, Jian-Jun; Mao, Wenbin; Zhang, Liangliang; Oestreich, Martin
Source:
Chemical Society reviews 2021 v.50 no.3 pp. 2010-2073
ISSN:
1460-4744
Subject:
silicon,   etc   ; boron; catalytic activity;     Show all 3 Subjects
Abstract:
... Si–B reagents, namely silylboronic esters and silylboranes, have become increasingly attractive as versatile reagents to introduce silicon and boron atoms into organic frameworks. Diverse transformations through transition-metal-catalysed or transition-metal-free Si–B bond activation have become available. This Review summarises the recent developments in the now broad field of Si–B chemistry and ...
DOI:
10.1039/d0cs00965b

2. Petal-like metal-organic framework stabilized Si@C with long cycle life and excellent kinetics

Author:
Yang, Haining; Ji, Shijun; Yin, Jinpeng; Feng, Wei; Kong, Weiqiang; Wen, Zhongsheng
Source:
Journal of colloid and interface science 2021 v.586 pp. 381-390
ISSN:
0021-9797
Subject:
silicon,   etc   ; coordination polymers; electrochemistry; lithium;     Show all 4 Subjects
Abstract:
... Poor electrochemical kinetics caused by the unstable structure for the dramatically volumetric expansion (>300%) hinders the application of silicon in rechargeable lithium ion batteries. Si@C-Ni-MOF composites with petal-like Ni-MOFs as the skeleton and Si@C nanoparticles as the active center were synthesized via facile solvothermal process. The resulting Ni-MOF-Si@C material maintains admirable s ...
DOI:
10.1016/j.jcis.2020.10.102

3. Nanoscale zero-valent iron supported by attapulgite produced at different acid modification: Synthesis mechanism and the role of silicon on Cr(VI) removal

Author:
Zhang, Wenying; Qian, Linbo; Chen, Yun; Ouyang, Da; Han, Lu; Shang, Xiao; Li, Jing; Gu, Mingyue; Chen, Mengfang
Source:
Chemosphere 2021 v.267 pp. 129183
ISSN:
0045-6535
Subject:
silicon,   etc   ; crystallization; iron; models; oxidation;     Show all 5 Subjects
Abstract:
... The attapulgite of different morphologies and mineral compositions were successfully obtained following the treatment by HCl and HF with different concentrations. Variations of morphologies, elemental and mineral components of the pristine and modified attapulgite were investigated and assessed in detail by a series of characterization methods. The SEM-EDS results indicated significant variations ...
DOI:
10.1016/j.chemosphere.2020.129183

4. Reversible C(sp³)-Si Oxidative Addition of Unsupported Organosilanes: Effects of Silicon Substituents on Kinetics and Thermodynamics

Author:
Chapp, Scott M.; Schley, Nathan D.
Source:
Journal of the American Chemical Society 2021 v.143 no.14 pp. 5534-5539
ISSN:
1520-5126
Subject:
silicon,   etc   ; iridium; kinetics; olefin; silylation; thermodynamics;     Show all 6 Subjects
Abstract:
... The intermolecular oxidative addition of unactivated C(sp³)-Si bonds is reported for a family of organosilanes at a cationic pincer-supported iridium complex. To our knowledge, no examples of oxidative addition to give analogous unsupported (alkyl)metal silyl complexes have been previously reported. The generality of this transformation is excellent, with successful examples demonstrated for tetra ...
DOI:
10.1021/jacs.1c01564

5. Surface-enhanced Raman spectroscopy (SERS): a powerful technique to study the SEI layer in batteries

Author:
Piernas-Muñoz, M. J.; Tornheim, A.; Trask, S.; Zhang, Z.; Bloom, I.
Source:
Chemical communications 2021 v.57 no.18 pp. 2253-2256
ISSN:
1364-548X
Subject:
silicon,   etc   ; Raman spectroscopy; anodes; electrolytes; electroplating;     Show all 5 Subjects
Abstract:
... The solid electrolyte interphase (SEI) layer on a silicon anode is investigated by SERS. Gold electrodeposition on a silicon electrode is confirmed by SEM, and Raman enhancement is proved, allowing determination of the partial composition of its SEI. For the first time, organophosphate-derivatives seem to be detected by Raman. ...
DOI:
10.1039/d0cc08001b

6. Silicon recovery from diamond wire saw silicon powder waste with hydrochloric acid pretreatment: An investigation of Al dissolution behavior

Author:
Yang, Shicong; Wan, Xiaohan; Wei, Kuixian; Ma, Wenhui; Wang, Zhi
Source:
Waste management 2021 v.120 pp. 820-827
ISSN:
0956-053X
Subject:
silicon,   etc   ; hydrochloric acid; thermodynamics; waste management; wastes;     Show all 5 Subjects
Abstract:
... Silicon recovery from diamond wire saw silicon powder (DWSSP) waste is of great significance for increasing production profits and alleviating hazardous effects on the ecological environment. The purity of recovered silicon powder is determined by the purification efficiency during acid leaching pretreatment. Because the metallic impurities present in DWSSP are mostly physically mixed rather than ...
DOI:
10.1016/j.wasman.2020.11.005

7. Silicon Defence in Plants: Does Herbivore Identity Matter?

Author:
Johnson, Scott N.; Hartley, Susan E.; Moore, Ben D.
Source:
Trends in plant science 2021 v.26 no.2 pp. 99-101
ISSN:
1360-1385
Subject:
silicon,   etc   ; diet; herbivores; livestock; pests; physiology;     Show all 6 Subjects
Abstract:
... Silicon accumulation is a key defence against herbivorous pests, but may have wider detrimental impacts if plants become unpalatable for livestock. We argue that some herbivores are better adapted to silicon-rich diets than others; herbivore anatomy and physiology, and the nature of silicon deposition, are crucial to understanding these differences. ...
DOI:
10.1016/j.tplants.2020.10.005

8. A novel fabrication technique for high-aspect-ratio nanopillar arrays for SERS application

Author:
Duan, Tianli; Gu, Chenjie; Ang, Diing Shenp; Xu, Kang; Liu, Zhihong
Source:
RSC advances 2020 v.10 no.73 pp. 45037-45041
ISSN:
2046-2069
Subject:
silicon,   etc   ; absorption; chromium;     Show all 3 Subjects
Abstract:
... A novel technique is demonstrated for the fabrication of silicon nanopillar arrays with high aspect ratios. Our technique leverages on an “antenna effect” present on a chromium (Cr) hard mask during ion-coupled plasma (ICP) etching. Randomly distributed sharp tips around the Cr edge act as antennas that attract etchant ions, which in turn enhance the etching of the Cr edge. This antenna effect lea ...
DOI:
10.1039/d0ra09145f

9. Planar pentacoordinate silicon and germanium atoms

Author:
Wang, Meng-hui; Dong, Xue; Cui, Zhong-hua; Orozco-Ic, Mesías; Ding, Yi-hong; Barroso, Jorge; Merino, Gabriel
Source:
Chemical communications 2020 v.56 no.89 pp. 13772-13775
ISSN:
1364-548X
Subject:
silicon,   etc   ; carbon; germanium;     Show all 3 Subjects
Abstract:
... The global minimum of XMg₄Y⁻ (X = Si, Ge; Y = In, Tl) and SiMg₃In₂ contains a planar pentacoordinate atom of group 14 other than carbon. Its design is based on the “localization” approach, replacing one or two peripheral atoms in XMg₅²⁻ by more electronegative ones. This change diminishes the repulsion and leads to stronger covalent X–Y bonds, stabilizing the planar pentacoordinate atom species. ...
DOI:
10.1039/d0cc06107g

10. SLAP reagents for the photocatalytic synthesis of C3/C5-substituted, N-unprotected selenomorpholines and 1,4-selenazepanes

Author:
Zhou, Guan; Deng, Xingwang; Pan, Chenyu; Goh, Eunice Tze Leng; Lakshminarayanan, Rajamani; Srinivasan, Rajavel
Source:
Chemical communications 2020 v.56 no.83 pp. 12546-12549
ISSN:
1364-548X
Subject:
silicon,   etc   ; heterocyclic compounds; photocatalysis;     Show all 3 Subjects
Abstract:
... Herein, we disclose the first set of unique selenium-containing SLAP (SiLicon Amine Protocol) reagents for the direct synthesis of C3/C5-substituted selenomorpholines and 1,4-selenazepanes from diverse (hetero)aldehydes under mild photocatalytic conditions. Enantiomerically pure 1,2-amino alcohol/α-amino acid versions of these heterocycles were also synthesized. Further, we have shown the late-sta ...
DOI:
10.1039/d0cc04471g

11. 2D Waveguided Bessel Beam Generated Using Integrated Metasurface-Based Plasmonic Axicon

Author:
Fan, Yulong; Cluzel, Benoît; Petit, Marlène; Le Roux, Xavier; Lupu, Anatole; de Lustrac, Andre
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 21114-21119
ISSN:
1944-8252
Subject:
silicon,   etc   ; engineering; image analysis;     Show all 3 Subjects
Abstract:
... Near-field imaging of the propagation of a diffraction-free Bessel-type beam in a guided wave configuration generated by means of a metasurface-based axicon lens integrated on a silicon waveguide is reported. The operation of the axicon lens with a footprint as small as 11 μm² is based on local engineering of the effective index of the silicon waveguide with plasmonic nanoresonators. This generic ...
DOI:
10.1021/acsami.0c03420

12. Reliable and Robust Fabrication Rules for Springtail-Inspired Superomniphobic Surfaces

Author:
Kang, Seong Min; Choi, Ji Seong; An, Joon Hyung
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 21120-21126
ISSN:
1944-8252
Subject:
silicon,   etc   ; durability; polymers;     Show all 3 Subjects
Abstract:
... We report a reliable and robust method for the fabrication of bioinspired superomniphobic surfaces with precise concave-cap-shaped micropillar arrays. This method includes silicon-based conventional microelectromechanical systems (MEMS) and polymer replication processes. We have elucidated two critical cases of fabrication rules for precise micromachining of a negative-shaped bioinspired silicon m ...
DOI:
10.1021/acsami.0c03986

13. Osmotic evolution of composite liquid marbles

Author:
Kumar Roy, Pritam; Legchenkova, Irina; Shoval, Shraga; Dombrovsky, Leonid A.; Bormashenko, Edward
Source:
Journal of colloid and interface science 2021 v.592 pp. 167-173
ISSN:
0021-9797
Subject:
silicon,   etc   ; Lycopodium; liquids; mass transfer; oils; saline water; silicone;     Show all 7 Subjects
Abstract:
... We hypothesized that the reported evolution (growth) of composite water marbles filled with saline water and coated with lycopodium dispersed in a thin layer of silicone oil is due to the osmotic mass transfer. The hypothesis is supported by the semi-empirical model of osmotic growth of small liquid marbles floating on distilled water.Saline composite, silicone oil-coated marbles floating on disti ...
DOI:
10.1016/j.jcis.2021.02.055

14. Facile synthesis and immobilization of functionalized covalent organic framework-1 for electrochromatographic separation

Author:
Bao, Tao; Wang, Sicen; Zhang, Nan; Zhang, Juan
Source:
Journal of chromatography 2021 v.1645 pp. 462130
ISSN:
0021-9673
Subject:
silicon,   etc   ; catalysts; chlorobenzene; chromatography; ethylbenzene; naphthalene; stabilizers; styrene;     Show all 8 Subjects
Abstract:
... Inspired by the outstanding functions of 3-aminopropyltriethoxysilane (APTES), which can be used for functionalization of both covalent organic frameworks (COFs) and substrate surfaces, herein, a proof-of-concept demonstration was carried out by one-step synthesis and immobilization of COF-1 in capillary. COF-1 was grown on the inner wall of capillary using APTES, which played a triple role of cat ...
DOI:
10.1016/j.chroma.2021.462130

15. Crop Residues as Potential Sustainable Precursors for Developing Silica Materials: A Review

Author:
Setiawan, Wahyu Kamal; Chiang, Kung-Yuh
Source:
Waste and biomass valorization 2021 v.12 no.5 pp. 2207-2236
ISSN:
1877-2641
Subject:
silicon,   etc   ; biomass; energy; fertilizers; lignocellulose; phytoliths; silica; sugarcane;     Show all 8 Subjects
Abstract:
... Prospecting for sustainable resources will be feasible to generate silica materials extensively used for various commercial applications. Accumulated amorphous silica, called phytolith, is found in the crop residues removed during the harvesting process. Hence, it will be beneficial to understand the potential for various kinds of crop residues used as silica production resource regarding their gl ...
DOI:
10.1007/s12649-020-01126-x

16. A surface-engineering-assisted method to synthesize recycled silicon-based anodes with a uniform carbon shell-protective layer for lithium-ion batteries

Author:
Shi, Jian; Jiang, Xuesong; Sun, Jifei; Ban, Boyuan; Li, Jingwei; Chen, Jian
Source:
Journal of colloid and interface science 2021 v.588 pp. 737-748
ISSN:
0021-9797
Subject:
silicon,   etc   ; anodes; carbon; carbonization; pyrolysis; silane; water reuse;     Show all 7 Subjects
Abstract:
... Yolk-shell silicon/carbon composite encapsulated by uniform carbon shell (Si@C) are becoming an effective method to mitigate volume-related issues of Si-based anodes and maintain an excellent performance for lithium-ion batteries (LIBs). However, a uniform carbon shell in Si@C is difficult to guarantee. Herein, a facile surface-engineering-assisted strategy is described to prepare Si@C composite w ...
DOI:
10.1016/j.jcis.2020.11.105

17. Low temperature in situ formation of cobalt in silicon nitride toward functional nitride nanocomposites

Author:
Tada, Shotaro; Mallmann, Maira Debarba; Takagi, Haruna; Iihama, Junya; Asakuma, Norifumi; Asaka, Toru; Daiko, Yusuke; Honda, Sawao; Nishihora, Rafael Kenji; Machado, Ricardo Antonio Francisco; Bernard, Samuel; Iwamoto, Yuji
Source:
Chemical communications 2021 v.57 no.16 pp. 2057-2060
ISSN:
1364-548X
Subject:
silicon nitride,   etc   ; ammonia; cobalt; nanocomposites; nanocrystallites; pyrolysis; temperature;     Show all 7 Subjects
Abstract:
... This work highlights the first demonstration of a low-temperature in situ formation of Co nanocrystallites embedded within an amorphous silicon nitride matrix through careful control of the chemistry behind material design using perhydropolysilazane (PHPS) as a Si₃N₄ precursor further coordinated with CoCl₂ and ammonia as a pyrolysis atmosphere. The Co nucleation was allowed to proceed at temperat ...
DOI:
10.1039/d0cc07366k

18. Tuning p-Si(111) Photovoltage via Molecule|Semiconductor Electronic Coupling

Author:
Boucher, Dylan G.; Kearney, Kara; Ertekin, Elif; Rose, Michael J.
Source:
Journal of the American Chemical Society 2021 v.143 no.6 pp. 2567-2580
ISSN:
1520-5126
Subject:
silicon,   etc   ; anthracenes; electrochemistry; paraquat; semiconductors; structure-activity relationships;     Show all 6 Subjects
Abstract:
... Photoelectrochemical (PEC) device efficiency depends heavily on the energetics and band alignment of the semiconductor|overlayer junction. Exerting energetic control over these junctions via molecular functionalization is an extremely attractive strategy. Herein we report a study of the structure–function relationship between chemically functionalized pSi(111) and the resulting solar fuels perform ...
DOI:
10.1021/jacs.0c12075

19. Comparison of diamond nanoparticles captured on the floating and grounded membranes in the hot filament chemical vapor deposition process

Author:
Kim, Hwan-Young; Kim, Da-Seul; Hwang, Nong-Moon
Source:
RSC advances 2021 v.11 no.10 pp. 5651-5657
ISSN:
2046-2069
Subject:
silicon,   etc   ; crystal structure; graphene; nanodiamonds; transmission electron microscopes; vapors;     Show all 6 Subjects
Abstract:
... Negatively charged diamond nanoparticles are known to be generated in the gas phase of the hot filament chemical vapor deposition (HFCVD) process. However, the structures of these nanoparticles remain unknown. Also, the effect of charging on the stability of nanodiamond structures has not been studied experimentally. Here, by installing a capturing apparatus in an HFCVD reactor, we succeeded in ca ...
DOI:
10.1039/d0ra09649k

20. Minimising atomisation drift potential by exploring the break-up of liquid sheets using multiphase methylated soybean and silicon oil emulsions

Author:
Cryer, Steven A.; Altieri, Anthony L.; Schmucker, Abrin L.; Day, Kristina M.
Source:
Biosystems engineering 2021 v.202 pp. 142-151
ISSN:
1537-5110
Subject:
silicon,   etc   ; atomization; droplet size; droplets; liquids; methylation; oils; soybeans; surfactants;     Show all 9 Subjects
Abstract:
... During atomisation, modified agricultural spray formulations can produce less fine spray (for drift control) or reduce the overall droplet size distribution (for efficacy). Motivated by the technical literature concerning antifoaming agents, emulsions with and without solid particles were studied to examine their effect on atomisation. For emulsions, the effects of oil type, oil droplet diameter, ...
DOI:
10.1016/j.biosystemseng.2020.12.004