High-Rate Assembly of Nanomaterials on Insulating Surfaces Using Electro-Fluidic Directed Assembly

Yilmaz, Cihan; Sirman, Asli; Halder, Aditi; Busnaina, Ahmed

doi:10.1021/acsnano.6b07477

Cited by 21 publications

(32 citation statements)

References 40 publications

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“…Indeed, several works have shown that even a single material system shows diverse structures and complex properties by carefully directing the self-assembly. [26][27][28] In addition to being model colloidal systems, nanoemulsions are widely used in applications such as food products, cosmetics, pharmaceuticals, and enhanced oil recovery for which the ability to engineer material properties through processing conditions is desirable. 29…”

Section: Introductionmentioning

confidence: 99%

Thermal processing of thermogelling nanoemulsions as a route to tune material properties

et al. 2018

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Many soft matter systems have properties which depend on their processing history. It is generally accepted that material properties can be finely tuned by carefully directing self-assembly. However, for gelling colloidal systems, it is difficult to characterize such path-dependent effects since the colloidal attraction is often provided by adding another component to the system such as salts or depletants. Therefore, studies of and an understanding of the role of processing on the material properties of attractive colloidal systems are largely lacking. In this work, we systematically studied how processing greatly influences the properties and the microstructures of model attractive colloidal systems. We perform experiments using a thermogelling nanoemulsion as a model system where the isotropic attraction can be precisely tuned via the temperature. The effects of processing conditions on gel formation and properties is tested by performing well-designed sequential temperature jumps. By properly controlling the thermal history, we demonstrate that properties of colloidal gels can be beyond the limit set by direct quenching, which has been a major focus in literature, and that otherwise slow aging of the system associated with a decrease in elasticity can be prevented. Our results provide new experimental evidence of path-dependent rheology and associated microstructures in attractive colloidal systems and provide guidance to future applications in manufacturing complex colloid-based materials.

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Section: Introductionmentioning

confidence: 99%

Thermal processing of thermogelling nanoemulsions as a route to tune material properties

et al. 2018

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“…Rapid advances in high‐rate large‐area fabrication techniques are enabling new ways of realizing electronic devices. Along with a number of groups, we believe that revolutionary transistor design presents opportunities that are inaccessible to evolutionary developments, in terms of energy efficiency, gain, and large‐area manufacturability.…”

Section: Structural and Electrical Characteristics Of Source‐gated Trmentioning

confidence: 99%

Novel Tunnel‐Contact‐Controlled IGZO Thin‐Film Transistors with High Tolerance to Geometrical Variability

et al. 2019

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Thin insulating layers are used to modulate a depletion region at the source of a thin‐film transistor. Bottom contact, staggered‐electrode indium gallium zinc oxide transistors with a 3 nm Al2O3 layer between the semiconductor and Ni source/drain contacts, show behaviors typical of source‐gated transistors (SGTs): low saturation voltage (VD_SAT ≈ 3 V), change in VD_SAT with a gate voltage of only 0.12 V V−1, and flat saturated output characteristics (small dependence of drain current on drain voltage). The transistors show high tolerance to geometry: the saturated current changes only 0.15× for 2–50 µm channels and 2× for 9‐45 µm source‐gate overlaps. A higher than expected (5×) increase in drain current for a 30 K change in temperature, similar to Schottky‐contact SGTs, underlines a more complex device operation than previously theorized. Optimization for increasing intrinsic gain and reducing temperature effects is discussed. These devices complete the portfolio of contact‐controlled transistors, comprising devices with Schottky contacts, bulk barrier, or heterojunctions, and now, tunneling insulating layers. The findings should also apply to nanowire transistors, leading to new low‐power, robust design approaches as large‐scale fabrication techniques with sub‐nanometer control mature.

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“…[18,22] Interactions between the functional materials and regular solution features in their microliquid environment govern the formation of the structures. [23,24] Precise manipulation of multiphase flows during the micropatterning process is essential for heterogeneous integration of various functional materials. [25] This requires a reliable strategy to achieve microscale heterostructures by regulating liquid flows and interfaces, particularly for dots and lines due to their key role in building miniaturized and integrated operating systems.…”

Section: Lateral Functional Devicesmentioning

confidence: 99%

“…However, the difficulty of the manipulation of the dynamic flow of the solution in the microliquid patterning process leads to uncontrollable interfacing connection and low precision of composite micropatterns, resulting in poor device performance . Interactions between the functional materials and regular solution features in their microliquid environment govern the formation of the structures . Precise manipulation of multiphase flows during the micropatterning process is essential for heterogeneous integration of various functional materials .…”

mentioning

confidence: 99%

Patterned Arrays of Functional Lateral Heterostructures via Sequential Template‐Directed Printing

Zheng

et al. 2018

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The precise integration of microscale dots and lines with controllable interfacing connections is highly important for the fabrication of functional devices. To date, the solution-processible methods are used to fabricate the heterogeneous micropatterns for different materials. However, for increasingly miniaturized and multifunctional devices, it is extremely challenging to engineer the uncertain kinetics of a solution on the microstructures surfaces, resulting in uncontrollable interface connections and poor device performance. Here, a sequential template-directed printing process is demonstrated for the fabrication of arrayed microdots connected by microwires through the regulation of the Rayleigh-Taylor instability of material solution or suspension. Flexibility in the control of fluidic behaviors can realize precise interface connection between the micropatterns, including the microwires traversing, overlapping or connecting the microdots. Moreover, various morphologies such as circular, rhombic, or star-shaped microdots as well as straight, broken or curved microwires can be achieved. The lateral heterostructure printed with two different quantum dots displays bright dichromatic photoluminescence. The ammonia gas sensor printed by polyaniline and silver nanoparticles exhibits a rapid response time. This strategy can construct heterostructures in a facile manner by eliminating the uncertainty of the multimaterials interface connection, which will be promising for the development of novel lateral functional devices.

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High-Rate Assembly of Nanomaterials on Insulating Surfaces Using Electro-Fluidic Directed Assembly

Cited by 21 publications

References 40 publications

Thermal processing of thermogelling nanoemulsions as a route to tune material properties

Thermal processing of thermogelling nanoemulsions as a route to tune material properties

Novel Tunnel‐Contact‐Controlled IGZO Thin‐Film Transistors with High Tolerance to Geometrical Variability

Patterned Arrays of Functional Lateral Heterostructures via Sequential Template‐Directed Printing

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