Metallic Nanobrushes Made using Ambient Droplet Sprays

Sarkar, Depanjan; Mahitha, Maheswari Kavirajan; Som, Anirban; Li, Anyin; Wleklinski, Michael; Cooks, R. Graham; Pradeep, Thalappil

doi:10.1002/adma.201505127

Cited by 31 publications

(38 citation statements)

References 31 publications

(11 reference statements)

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“…While synthesis of new molecules in sprays was observed before, bulk synthesis of molecules with which characterization is possible was not attempted earlier. Using a home-built nano-electrospray source, Sarkar et al 127 showed that spraying an aqueous solution of silver acetate (AgOAc) over a TEM grid, resulted in the formation of 1D nanowire structures of Ag NPs (Fig. 18).…”

Section: Mass Spectrometry As a Tool For Materials Synthesismentioning

confidence: 99%

The emerging interface of mass spectrometry with materials

Chakraborty

Pradeep

2019

NPG Asia Mater

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Mass spectrometry (MS), a hundred-year-old subject, has been a technique of profound importance to molecular science. Its impact in solid-state materials science has not been evident, although many materials of modern science, such as fullerenes, have their origins in MS. Of late, mass spectrometric interface with materials is increasingly strengthened with advances in atomically precise clusters of noble metals. Advances in instrumentation along with recent developments in synthetic approaches have expanded the chemistry of clusters, and new insights into matter at the nanoscale are emerging. High-resolution MS coupled with soft ionization techniques enable efficient characterization of atomically precise clusters. Apart from that, techniques such as ion mobility, tandem MS, etc. reveal structural details of these systems. Growth, nucleation, and reactivity of clusters are also probed by MS. Some of the recent advancements in this field include the development of new hyphenated techniques. Finer structural details may be obtained by coupling MS with spectroscopic tools, such as photoelectron spectroscopy, vacuum ultraviolet spectroscopy, etc. With such advancements in instrumentation, MS can evolve into a universal tool for the characterization of materials. The present review captures highlights of this area.

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Section: Mass Spectrometry As a Tool For Materials Synthesismentioning

confidence: 99%

The emerging interface of mass spectrometry with materials

Chakraborty

Pradeep

2019

NPG Asia Mater

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“…Moreover, Cooks prepared metallic nanobrushes by exploitation of the Coulombic forces present in the electrolytic spray system; this is expected to generate interest in this method for creating metallic crystals, thanks to its ease in fabricating such structures directly from solutions and the efficient control of size and composition. [24] Therefore, ES technology has the potential to grow to become one of the future mainstream technologies for controlled preparation of crystals. Sodium chloride, one of the simplest crystal systems, often serves as a test sample to explore the performance of crystal technology.…”

Section: Introductionmentioning

confidence: 99%

Controlled Crystallization of Sodium Chloride Nanocrystals in Microdroplets Produced by Electrospray from an Ultra‐Dilute Solution

et al. 2016

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Controlled crystallization is very important for crystal growth. The electrospray (ES) technique has attracted great interest thanks to its advantages of facile manipulation of micrometer droplets and the generation of fine and charged droplets with very narrow size dispersion. In this work, nanocrystals with cubic shapes with 32 nm edges were successfully grown from ultra-dilute NaCl solution (1 μg mL -1 ) on a millisecond timescale by an ES technique. Dispersed and charged microdroplets were created by ES. In the process, an increase in ion strength and built-in electric field in microdroplets promoted nucleation and

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“…Ambient, solution state techniques to create well‐defined metallic nanostructures over large areas are still limited. In an earlier report from our group, long (80 µm) nanowire (NW) arrays were made through electrospray ionization‐induced creation and deposition of Ag nanoparticles (NPs), under ambient conditions . These wires could be grown over several cm 2 areas to make a metallic grassland like morphology.…”

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“…A combination of all these effects led to high water capture efficiency (56.6 L d −1 m −2 ) at a prototype‐scale. Although we have used Ag NWs reported previously as the initial building block of our patterned NWs, the present work focuses on a method of creating hydrophilic‐hydrophobic patterned NWs using two simple steps, which mimic the above mentioned examples from nature and combine their special features to achieve highest water capture efficiency reported till date.…”

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confidence: 99%

“…A schematic representation of the ESD process along with the dimensional descriptions is shown in Figure S1 (Supporting Information). As the growth of unpatterned NWs was described previously, we present only the essential aspects here. A detailed description of the synthesis and characterization (electron microscopy, elemental analysis) of the Ag NWs on an empty transmission electron microscopy (TEM) grid, which form the core of the patterned NWs, is given in the Supporting Information (Figures S2–S8, Supporting Information).…”

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Patterned Nanobrush Nature Mimics with Unprecedented Water‐Harvesting Efficiency

Sarkar

Mahapatra

Som

et al. 2018

Adv Materials Inter

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This is due to the fact that at any given moment, the earth's atmosphere contains an astounding 37.5 million billion gallons of water as vapor, [2] and an efficient device to capture a fraction of this water vapor, in a cost-effective way would help solve the water crisis.Over the period of human existence, it has become apparent that biomimicking is the most efficient way to tackle such problems. When we look into nature, there are organisms, which in the course of evolution have acquired physical traits that enabled them to capture atmospheric water, even in the most arid corners of our planet. One such example is the Stenocara beetle of Namib Desert which capture water on its hardened forewings. [3] Electron microscopic images of these have revealed unique array of hydrophilic regions distributed on a superhydrophobic background, [4] creating a surface energy gradient, which facilitates efficient condensation and transportation of atmospheric water. Another such example is spider silk, which shows unique periodic spindle-knot structure when wetted and efficiently collects water from atmosphere through the combination of surface energy gradient and Laplace pressure difference. Other inspirations from nature are some cactaceae species which live in arid environments and are extremely drought-tolerant. [5] These species are shown to have structures with spines and trichomes which enable them to condense humidity efficiently from the atmosphere. Grasslands are also examples of natural atmospheric water harvesters. Hence, micro/nanostructuring of the water-collecting surface plays a critical role in determining the efficiency of water capture. With the advancement of nanotechnology, significant efforts have been directed toward fabricating surfaces with similar morphological features and chemical patterning to enable efficient water capture. [6,7] However, these natural and nature-mimicked surfaces collect atmospheric water in the form of dew/fog and require the temperature to drop below the dew point to cause condensation. For building a practical and round-the-clock operating atmospheric water generator, it is important to cool the condensing surfaces and the surrounding air efficiently, with minimum energy input. Heat transfer efficiency of the condensing surface material is as important as the water transfer efficiency for creating a viable radiative condenser. Although many biomimetic, patterned surfaces have been made for fog collection, inspired by active condensing Water scarcity is one of the most alarming problems of the planet. An ambient ion based method is developed to make hydrophilic-hydrophobic patterned silver nanowires (NWs) as humidity harvesters of unprecedented efficiency. Such water harvesters are developed by two-step surface modification of the as-synthesized NWs (known from a report earlier) using electrospray. These patterned NWs of ≈20 µm length and ≈200 nm width grown over a relatively large area (2 × 2 cm 2 ) exhibit atmospheric water capture (AWC) efficiency of 56.6 L m −2 d −1 , the...

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Metallic Nanobrushes Made using Ambient Droplet Sprays

Cited by 31 publications

References 31 publications

The emerging interface of mass spectrometry with materials

The emerging interface of mass spectrometry with materials

Controlled Crystallization of Sodium Chloride Nanocrystals in Microdroplets Produced by Electrospray from an Ultra‐Dilute Solution

Patterned Nanobrush Nature Mimics with Unprecedented Water‐Harvesting Efficiency

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Metallic Nanobrushes Made using Ambient Droplet Sprays

Cited by 31 publications

References 31 publications

The emerging interface of mass spectrometry with materials

The emerging interface of mass spectrometry with materials

Controlled Crystallization of Sodium Chloride Nanocrystals in Microdrop­lets Produced by Electrospray from an Ultra‐Dilute Solution

Patterned Nanobrush Nature Mimics with Unprecedented Water‐Harvesting Efficiency

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Controlled Crystallization of Sodium Chloride Nanocrystals in Microdroplets Produced by Electrospray from an Ultra‐Dilute Solution