Ultralight Conductive Silver Nanowire Aerogels

Qian, Fang; Lan, Pui Ching; Freyman, Megan C.; Chen, Wen; Kou, Tianyi; Olson, Tammy Y.; Zhu, Cheng; Worsley, Marcus A.; Duoss, Eric B.; Spadaccini, Christopher M.; Baumann, Theodore F.; Han, T. Yong-Jin

doi:10.1021/acs.nanolett.7b02790

Cited by 178 publications

(121 citation statements)

References 36 publications

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“…Generally, a regular shape and sufficiently high mechanical strength are a premises to perform these measurements via commonly used techniques, such as the electrical conductivity as obtained by I – V curves from four‐point probe tests, the mechanical modulus as characterized by dynamic mechanical analysis, etc. Although these properties have been investigated in certain NMF systems, such as silver foams obtained by freeze‐casting and gold foams derived from dealloying, vital challenges exist to obtain reliable data, particularly for NMA systems because of their extreme fragileness.…”

Section: Characterizationmentioning

confidence: 99%

“…g–i) Silver foams fabricated by freeze‐casting coupled with post heat treatment, SEM image, digital photo (inset), and TEM images. Adapted with permission . Copyright 2017, American Chemical Society.…”

Section: Fabrication Strategiesmentioning

confidence: 99%

“…Among all noble metals, Ag is the first system engineered to NMFs by ice templating, which is pioneered by Yu's group in year 2014 . By unidirectional freezing as‐obtained concentrated Ag NW solutions, Ag foams with aligned macroporous (several micrometers to several tens of micrometers) were obtained (Figure f), displaying low densities of 10–40 mg cm −3 and high electrical conductivity up to 50 S cm −1 .…”

Section: Fabrication Strategiesmentioning

confidence: 99%

See 2 more Smart Citations

Engineering Self‐Supported Noble Metal Foams Toward Electrocatalysis and Beyond

Hübner

et al. 2019

Advanced Energy Materials

103

105

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Noble metals, despite their expensiveness, display irreplaceable roles in widespread fields. To acquire novel physicochemical properties and boost the performance‐to‐price ratio for practical applications, one core direction is to engineer noble metals into nanostructured porous networks. Noble metal foams (NMFs), featuring self‐supported, 3D interconnected networks structured from noble‐metal‐based building blocks, have drawn tremendous attention in the last two decades. Inheriting structural traits of foams and physicochemical properties of noble metals, NMFs showcase a variety of interesting properties and impressive prospect in diverse fields, including electrocatalysis, heterogeneous catalysis, surface‐enhanced Raman scattering, sensing and actuation, etc. A number of NMFs have been created and versatile synthetic approaches have been developed. However, because of the innate limitation of specific methods and the insufficient understanding of formation mechanisms, flexible manipulation of compositions, structures, and corresponding properties of NMFs are still challenging. Thus, the correlations between composition/structure and properties are seldom established, retarding material design/optimization for specific applications. This review is devoted to a comprehensive introduction of NMFs ranging from synthesis to applications, with an emphasis on electrocatalysis. Challenges and opportunities are also included to guide possible research directions in this field and promote the interest of interdisciplinary scientists.

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Section: Characterizationmentioning

confidence: 99%

Section: Fabrication Strategiesmentioning

confidence: 99%

Section: Fabrication Strategiesmentioning

confidence: 99%

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Engineering Self‐Supported Noble Metal Foams Toward Electrocatalysis and Beyond

Hübner

et al. 2019

Advanced Energy Materials

103

105

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“…Then, the preparation process has been simplified and one‐step gelation process has been proposed . Moreover, the metal aerogels can also be obtained by directly freeze drying the suspension of metal nanoparticles and nanowires . The metal aerogels often show fine and hierarchically porous structure, high specific surface area, and excellent catalytic performance.…”

Section: Preparation and Classification Of Aerogelsmentioning

confidence: 99%

“…Ag‐based aerogels show controllable optical transparency, porosity, and surface area by varying the amount of the oxidant used in the gelation process . Moreover, through the directional freeze drying, the obtained Ag aerogels show unique anisotropic microporous structure, and great potential in electronic devices . Cu‐based aerogels can be used as an efficient electrochemical catalyst for the CO 2 reduction and biosensing …”

Section: Preparation and Classification Of Aerogelsmentioning

confidence: 99%

Versatile Aerogels for Sensors

Yang

Zheng

et al. 2019

Small

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Aerogels are unique solid‐state materials composed of interconnected 3D solid networks and a large number of air‐filled pores. They extend the structural characteristics as well as physicochemical properties of nanoscale building blocks to macroscale, and integrate typical characteristics of aerogels, such as high porosity, large surface area, and low density, with specific properties of the various constituents. These features endow aerogels with high sensitivity, high selectivity, and fast response and recovery for sensing materials in sensors such as gas sensors, biosensors and strain and pressure sensors, among others. Considerable research efforts in recent years have been devoted to the development of aerogel‐based sensors and encouraging accomplishments have been achieved. Herein, groundbreaking advances in the preparation, classification, and physicochemical properties of aerogels and their sensing applications are presented. Moreover, the current challenges and some perspectives for the development of high‐performance aerogel‐based sensors are summarized.

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Reticulate Dual‐Nanowire Aerogel for Multifunctional Applications: a High‐Performance Strain Sensor and a High Areal Capacity Rechargeable Anode

Wang

Chen

et al. 2019

Adv Funct Materials

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Nanowire aerogels (NWAs) are highly versatile and used in many applications. However, most synthesized NWAs are composed of single components that may produce unsatisfactory aggregated performance in mechanical strength, conductivity, and electrochemistry. To address this issue, a reticulate dual-nanowire aerogel (rDNWA) composed of FeS 2 nanowires and carbon nanotubes (CNTs) via a simple solvothermal method is synthesized. The rDNWA possesses excellent compressibility (modulus of 1.32 MPa), good conductivity (0.65 S cm −1 ), and high porosity (>98%). It can be applied as a high-performance strain sensor with good sensitivity (Gauge Factor = 1.69) and enhanced stability. It can be densified to yield a high areal capacity of 10.0 mAh cm −2 and a high mass loading of 14.4 mg cm −2 after 100 cycles. As a freestanding anode for lithium ion battery (LIB), it exhibits a high specific mass capacity of 1031 mAh g −1 after 100 cycles at a current density of 100 mA g −1 and retains it to 729 mAh g −1 at a current density of 500 mA g −1 after 400 cycles. The outstanding overall performance of the hybrid aerogel is derived from the synergistic effect of intertwined CNTs and FeS 2 nanowires and can be extended to fabricate NWAs with novel multifunctional capabilities.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201807467. management, sensing, catalysis, etc. [1][2][3][4][5][6][7] SNWAs have been constructed from metal (Cu, Ag, Pd) nanowires, [2,[8][9][10][11] metal oxide (TiO 2 , MnO 2 , K 2−x Mn 8 O 16 ) nanowires, [5,[12][13][14] and other inorganic nanowires (Silica, C, SiC) [4,[15][16][17] and they are all composed of single nanowires that often constrained them to a single outstanding performance in say either the mechanical strength, conductivity, or electrochemical property (capacity, stability, and rate performance for a lithium ion battery (LIB)) but unsatisfactory when their collective capabilities are considered. For example, the Cu NWAs reported by Jung et al. [9] have superior conductivity (116 S cm −1 ) but due to the weak Van der Waals forces its mechanical strength is relatively low (Young's modulus: 1.2 kPa). The MnO 2 NWA synthesized by Long et al. [14] is intrinsically nonconductive even though its 1230 mAh g −1 theoretical capacity for an LIB is high. Carbon nanotube (CNT) aerogels [4] possess a relatively low specific capacity (372 mAh g −1 ) for an LIB despite being highly compressible with an excellent mechanical strength. Typically, most SNWAs are unable to concurrently satisfy several material stipulations of strength, conductivity, active electrochemistry, strain sensing, etc., required in a multifunctional application.To address this issue, much effort has been focused on the fabrication of reticulate NWAs with multicomponents. The mechanical blending of nonconductive nanowires with conductive materials (graphene, for example) during a preparation process (via a sol-gel method) is an effective way to improve their conductivity. ...

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Ultralight Conductive Silver Nanowire Aerogels

Cited by 178 publications

References 36 publications

Engineering Self‐Supported Noble Metal Foams Toward Electrocatalysis and Beyond

Engineering Self‐Supported Noble Metal Foams Toward Electrocatalysis and Beyond

Versatile Aerogels for Sensors

Reticulate Dual‐Nanowire Aerogel for Multifunctional Applications: a High‐Performance Strain Sensor and a High Areal Capacity Rechargeable Anode

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