scholarly journals Direct Synthesis of Mesoporous Organosilica and Proof-of-Concept Applications in Lysozyme Adsorption and Supported Catalysis

ACS Omega ◽  
2020 ◽  
Vol 5 (30) ◽  
pp. 18842-18848
Author(s):  
Oriana Osta ◽  
Marianne Bombled ◽  
David Partouche ◽  
Florian Gallier ◽  
Nadège Lubin-Germain ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Proof Of Concept ◽  
Mesoporous Organosilica ◽  
Supported Catalysis ◽  
Lysozyme Adsorption

Direct Synthesis of Nanofibrous Nonwoven Carbon Components: Initial Observations, Capabilities and Challenges

2016 ◽  
Author(s):  
Mark A. Atwater ◽  
Roger J. Welsh
Keyword(s):  
Carbon Nanofibers ◽  
Carbon Nanomaterials ◽  
Carbon Nanofiber ◽  
Direct Synthesis ◽  
Nonwoven Material ◽  
Proof Of Concept ◽  
Cross Sectional ◽  
Nonwoven Materials ◽  
Selective Placement ◽  
Monolithic Structures

Wide-spread adoption of carbon nanomaterials has been hindered by inefficient production and utilization. A recently developed method has shown possibility to directly synthesize bulk nanostructured nonwoven materials from catalytically deposited carbon nanofibers. The basic manufacturing scheme involves constraining carbon nanofiber growth to create three-dimensionally featured, macroscale products. Although previously demonstrated as a proof of concept, the possibilities and pitfalls of the method at a larger scale have not yet been explored. In this work, the basic foundation for using the constrained formation of fibrous nanostructures (CoFFiN) process is established by testing feasibility in larger volumes (as much as 2000% greater than initial experiments) and by noting the macroscale carbon growth characteristics. It has been found that a variety of factors contribute to determining the basic qualities of the macroscale fiber collection (nonwoven material), and there are tunable parameters at the catalytic and constraint levels. The results of this work have established that monolithic structures of nonwoven carbon nanofibers can be created with centimeter dimensions in a variety of cross-sectional shapes. The only limit to scale noted is the tendency for nanofibers to entangle with one another during growth and self-restrict outward expansion to the mold walls. This may be addressed by selective placement of the catalyst in the mold.

Direct Synthesis of Bimetallic Nanoalloys from Corresponding Bulk Alloys

2013 ◽  
Vol 1546 ◽  
Author(s):  
Chi-Kai Lin ◽  
Tao Xu
Keyword(s):  
Ag Nanoparticles ◽  
Direct Synthesis ◽  
Water Soluble ◽  
Liquid Lithium ◽  
Proof Of Concept ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
Bimetallic Alloy ◽  
Transmission Electron ◽  
Bulk Alloys

AbstractWe report a transformative, all inorganic method-based synthesis of supported bimetallic alloy nanoparticles. We use Pd3Ag as a proof of concept. The method involves breaking down bulk Pd3Ag alloy into the nanoparticles in liquid lithium, converting metallic Li to LiOH, transferring Pd3Ag nanoparticles/LiOH mixture onto non-water soluble supports, followed by leaching off the LiOH with water under ambient conditions. The size of the resulting Pd3Ag nanoparticles was found narrowly distributed around 2.3 nm characterized by transmission electron microscope (TEM). In addition, studies by X-ray diffraction (XRD) showed that the resulting Pd3Ag nanoparticles inherited similar structure as the starting bulk Pd3Ag.

Direct Synthesis of Cubic Benzene-Bridged Mesoporous Organosilica Functionalized with Mercaptopropyl Groups as an Effective Adsorbent for Mercury and Silver Ions

2010 ◽  
Vol 114 (15) ◽  
pp. 7021-7029 ◽  
Author(s):  
Hao-Yiang Wu ◽  
Ching-Ting Chen ◽  
I-Ming Hung ◽  
Chia-Hsiu Liao ◽  
Shanmugam Vetrivel ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Silver Ions ◽  
Mesoporous Organosilica

Functionalization of periodic mesoporous organosilica with ureidopropyl groups by a direct synthesis method

2007 ◽  
Vol 101 (3) ◽  
pp. 381-387 ◽  
Author(s):  
Qi Wei ◽  
Li Liu ◽  
Zuo-Ren Nie ◽  
Hui-Qiao Chen ◽  
Yan-Li Wang ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Synthesis Method ◽  
Periodic Mesoporous Organosilica ◽  
Mesoporous Organosilica

Direct synthesis of large-pore ethane-bridged mesoporous organosilica functionalized with carboxylic groups

2009 ◽  
pp. 4402 ◽  
Author(s):  
Sonia Fiorilli ◽  
Beatrice Camarota ◽  
Daniela Perrachon ◽  
Maria Concetta Bruzzoniti ◽  
Edoardo Garrone ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Large Pore ◽  
Mesoporous Organosilica ◽  
Carboxylic Groups

scholarly journals Asymmetric hot-carrier thermalization and broadband photoresponse in graphene-2D semiconductor lateral heterojunctions

2019 ◽  
Vol 5 (6) ◽  
pp. eaav1493 ◽  
Author(s):  
Yuxuan Lin ◽  
Qiong Ma ◽  
Pin-Chun Shen ◽  
Batyr Ilyas ◽  
Yaqing Bie ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Monolayer Graphene ◽  
Proof Of Concept ◽  
Hot Carrier ◽  
Heterogeneous Interfaces ◽  
Matter Interaction ◽  
Dirac Electron ◽  
Light Matter Interaction ◽  
Low Dimensional ◽  
Carrier Thermalization

The massless Dirac electron transport in graphene has led to a variety of unique light-matter interaction phenomena, which promise many novel optoelectronic applications. Most of the effects are only accessible by breaking the spatial symmetry, through introducing edges, p-n junctions, or heterogeneous interfaces. The recent development of direct synthesis of lateral heterostructures offers new opportunities to achieve the desired asymmetry. As a proof of concept, we study the photothermoelectric effect in an asymmetric lateral heterojunction between the Dirac semimetallic monolayer graphene and the parabolic semiconducting monolayer MoS2. Very different hot-carrier cooling mechanisms on the graphene and the MoS2 sides allow us to resolve the asymmetric thermalization pathways of photoinduced hot carriers spatially with electrostatic gate tunability. We also demonstrate the potential of graphene-2D semiconductor lateral heterojunctions as broadband infrared photodetectors. The proposed structure shows an extreme in-plane asymmetry and provides a new platform to study light-matter interactions in low-dimensional systems.

scholarly journals Direct Synthesis of Nanofibrous Nonwoven Carbon Components: Initial Observations, Capabilities, and Challenges

2016 ◽  
Vol 4 (4) ◽  
Author(s):  
Mark A. Atwater ◽  
Roger J. Welsh ◽  
David S. Edwards
Keyword(s):  
Carbon Nanofibers ◽  
Carbon Nanomaterials ◽  
Carbon Nanofiber ◽  
Direct Synthesis ◽  
Nonwoven Material ◽  
Proof Of Concept ◽  
Cross Sectional ◽  
Nonwoven Materials ◽  
Selective Placement ◽  
Monolithic Structures

Widespread adoption of carbon nanomaterials has been hindered by inefficient production and utilization. A recently developed method has shown possibility to directly synthesize bulk nanostructured nonwoven materials from catalytically deposited carbon nanofibers (CNFs). The basic manufacturing scheme involves constraining carbon nanofiber growth to create three-dimensionally featured, macroscale products. Although previously demonstrated as a proof of concept, the possibilities and pitfalls of the method at a larger scale have not yet been explored. In this work, the basic foundation for using the constrained formation of fibrous nanostructures (CoFFiN) process is established by testing feasibility in larger volumes (as much as 2000% greater than initial experiments) and by noting the macroscale carbon growth characteristics. It has been found that a variety of factors contribute to determining the basic qualities of the macroscale fiber collection (nonwoven material), and there are tunable parameters at the catalytic and constraint levels. The results of this work have established that monolithic structures of nonwoven carbon nanofibers can be created with centimeter dimensions in a variety of cross-sectional shapes. The only limit to scale noted is the tendency for nanofibers to entangle with one another during growth and self-restrict outward expansion to the mold walls. This may be addressed by pregrowing carbon before placement or selective placement of the catalyst in the mold.

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