Hybrid nanomaterials through molecular and atomic layer deposition: Top down, bottom up, and in-between approaches to new materials

Gregorczyk, Keith; Knez, Mato

doi:10.1016/j.pmatsci.2015.06.004

Cited by 169 publications

(101 citation statements)

References 169 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…[24,25] In combination with the ALD fabrication of inorganic materials, a very convenient and highly controllable route to nanostructuring is molecular layer deposition (MLD) to produce hybrid inorganic-organic materials (Figure 1d). [26][27][28][29][30][31][32] The combined ALD/MLD technique has been used to fabricate various nanoscale oxide-organic superlattices in a highly controllable fashion [33] and crystalline ZnO-organic superlattices fabricated using hydroquinone (HQ, benzene-1,4-diol, HOC 6 H 4 OH) as the organic precursor indeed show orderof-magnitude reduction of thermal conductivity. [34] The orderof-magnitude reduction of thermal conductivity has also been proven for analogous hybrid TiO 2 -organic superlattices fabricated by ALD/MLD, highlighting the wider applicability of the oxide-organic superlattice approach for the thermal engineering of metal oxides.…”

Section: Wileyonlinelibrarycommentioning

confidence: 99%

Flexible Thermoelectric ZnO–Organic Superlattices on Cotton Textile Substrates by ALD/MLD

Karttunen

Sarnes

Townsend

et al. 2017

Adv Elect Materials

View full text Add to dashboard Cite

we focus on small-scale energy harvesting based on the thermoelectric effect.Thermoelectric materials can be used to convert waste heat to electric energy via Seebeck effect. They are characterized by a dimensionless figure-of-merit ZT = S 2 σT/(κ e + κ L ), where S is the Seebeck coefficient (thermopower), σ the electrical conductivity, T the temperature, and κ e and κ L the electronic and lattice contributions to the thermal conductivity κ. [12] Figure 1 illustrates the basic principle of a conventional thermoelectric (TE) energy conversion device and the concept of a TE generator device combined with a flexible substrate. Furthermore, Figure 1c shows how the ZT value arises from the abovementioned individual components. Alloys of bismuth telluride (Bi 2 Te 3 ) and antimony telluride (Sb 2 Te 3 ) are by far the most widely used TE materials. They show high ZT values for near-room-temperature applications and have been utilized for decades in solid-state refrigeration applications. A major obstacle for the widespread utilization of Bi-Sb-Te based thermoelectrics is the low abundance of tellurium: it is among the rarest elements in the Earth's crust. Furthermore, current thermoelectric generators based on conventional TE materials such as Bi 2 Te 3 are typically inflexible solid-state devices, which would not be convenient for mobile small-scale applications. [12] Consequently, there is a significant interest in producing flexible and efficient TE generator solutions. In particular, a mechanically flexible TE generator solution integrated with light-weight and comfortable textile substrates could be an enabling platform for body-heat-based energy harvesting.Recently Lee et al. fabricated woven-yarn thermoelectric textiles by coating electrospun polyacrylonitrile nanofiber cores with n-type Bi 2 Te 3 and p-type Sb 2 Te 3 and twisting them into flexible yarns. [13] By weaving the TE-coated yarns into textiles, they were able to obtain an output power of up to 8.56 W m −2 for a temperature difference of 200 K in the textile thickness direction. Another recent study on thermoelectric fabrics utilized a completely different type of material solution, where thermoelectric PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) polymer was used to coat a polyester fabric with a solution-based method. [14] This fabric-TE device was based on p-type PEDOT:PSS only, resulting in a so-called unileg-type device that produced an output power of about 260 µW m −2 for a temperature difference of 75 K.The thermoelectric properties of both pristine ZnO and ZnO-organic superlattice thin films deposited on a cotton textile are investigated. The thin films are fabricated by atomic layer deposition/molecular layer deposition, using hydroquinone as the organic precursor for the superlattices. The resulting thin-film coatings are crystalline, in particular when deposited on a textile substrate with a thin predeposited Al 2 O 3 seed layer. The thermoelectric properties of the ZnO and ZnO-organic superlattice coatings are comp...

show abstract

Section: Wileyonlinelibrarycommentioning

confidence: 99%

Flexible Thermoelectric ZnO–Organic Superlattices on Cotton Textile Substrates by ALD/MLD

Karttunen

Sarnes

Townsend

et al. 2017

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

“…The vast abundance and renewability of cellulose make it an 'almost inexhaustible' [2,3] material. It has been widely claimed by numerous researchers as the most abundant renewable biopolymer [4], natural polymer [5,6], natural organic bio material [7], biomass [8], biopolymer [9,10], natural polysaccharide [11], and renewable natural biopolymer [12]. Other prominent attributes of cellulose include multifunctionality [13], chemical stability and derivatizability [5], lightweight, high aspect ratio, excellent mechanical properties, low density, low coefficient of thermal expansion, functionalizable surface, and carbon neutrality [9].…”

Section: Introductionmentioning

confidence: 99%

Applications of cellulose nanomaterials in pharmaceutical science and pharmacology

Cao¹

2018

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. Cellulose nanomaterials (CNs) have been successfully applied to a variety of scientific areas in recent years with remarkable engineering utilities. As sustainable materials of huge abundance, CNs show significant potentials in fine-tune the microstructures and kinetics from the nano-level. This paper reviews recent key advancements of the use of CNs in the fields of pharmaceutical science and pharmacology. A broad overview of the development of CNs is provided, and the current methods to obtain the materials are discussed. The different types of processing techniques are reviewed, that are critical to the applications in pharmaceutical science and pharmacology. The key breakthroughs of applications in major fields are discussed, including oral administration, topical administration, tissue scaffolds, and antibacterial applications.

show abstract

“…26,27 Especially ALD onto textiles made from polymeric fibers like cotton, 28-31 cellulose 32,33 ,polyester, 30,34 polyamide, 35,36 polypropylene 36,37 , and silk 38,39 was successfully demonstrated in the literature. 26,27 Especially ALD onto textiles made from polymeric fibers like cotton, 28-31 cellulose 32,33 ,polyester, 30,34 polyamide, 35,36 polypropylene 36,37 , and silk 38,39 was successfully demonstrated in the literature.…”

Section: Introductionmentioning

confidence: 99%

“…Although ALD originates from semiconductor technology, nowadays it finds increasing interest in other areas, for example for the coating of fibrous and textile materials. 26,27 Especially ALD onto textiles made from polymeric fibers like cotton, 28-31 cellulose 32,33 ,polyester, 30,34 polyamide, 35,36 polypropylene 36,37 , and silk 38,39 was successfully demonstrated in the literature. Inorganic coatings on such fibers can for example lead to a higher water contact angle and can protect these fabrics from collecting dirt.…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition onto carbon fiber fabrics

2017

View full text Add to dashboard Cite

Carbon fiber fabrics, consisting of interwoven bundles of 3000 single fibers, were coated with Al2O3 using the atomic layer deposition (ALD) process, exposing the fabrics to alternating pulses of trimethyl aluminium and water vapors. The thickness and uniformity of the coatings were investigated using scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The obtained coatings were conformal, 84 ALD cycles gave rise to approximately 20‐nm‐thick coatings and 168 ALD cycles to approximately 40‐nm‐thick coatings. It was found, that a uniform coating can be obtained at a purge time of 40 seconds. Reducing purge times below 20 seconds gives rise to increased particle growth and thus the coating becomes inhomogeneous. Initially, the samples that were coated had a size of 2×10 cm (thickness 0.3 mm). The size of the fabric was subsequently increased up to 8×20 cm and a uniform coating of the same quality was obtained. By oxidizing the coated fabrics, fabrics composed of interwoven alumina microtubes were obtained. Infiltration of the microtubes with solutions of two distinguishable fluorescent dyes showed that interchange of the dyes between warp and weft microtubes occurs, but is absent at approximately 20% of the crossovers. Taking all our findings into account, we conclude that the majority of the fibers were separated from each other by the coating prior to the oxidation. This work demonstrates that ALD is a suitable method to produce thin, conformal coatings on the surface of carbon fiber fabrics.

show abstract

Hybrid nanomaterials through molecular and atomic layer deposition: Top down, bottom up, and in-between approaches to new materials

Cited by 169 publications

References 169 publications

Flexible Thermoelectric ZnO–Organic Superlattices on Cotton Textile Substrates by ALD/MLD

Flexible Thermoelectric ZnO–Organic Superlattices on Cotton Textile Substrates by ALD/MLD

Applications of cellulose nanomaterials in pharmaceutical science and pharmacology

Atomic layer deposition onto carbon fiber fabrics

Contact Info

Product

Resources

About