Individual Boron Nanowire Has Ultra-High Specific Young’s Modulus and Fracture Strength As Revealed by <i>in Situ</i> Transmission Electron Microscopy

Fei, Liu; Tang, Dai‐Ming; Gan, Haibo; Mo, Xiaoshu; Deng, Shaozhi; Xu, Ning; Bando, Yoshio; Golberg, Dmitri

doi:10.1021/nn404316a

Cited by 34 publications

(28 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Boron nanomaterials arouse enormous interest from both scientific and technological angles of view because of its unique chemical and physical properties, which ensure its wide applications in high‐temperature devices, high‐energy fuel, nuclear engineering, coatings, and field emission (FE) 12. Intriguingly, boron has a band gap (≈1.5 eV),11,[[qv: 13d]] and the theoretical study predicted that it has also a high conductance (≈10 2 Ω −1 cm −1 ) and carrier mobility (≈10 2 cm 2 V −1 s −1 ),14 which guarantee it to be a perfect combination of ideal semiconductor properties for the applications in electronics and optoelectronics.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances

et al. 2015

View full text Add to dashboard Cite

Large‐scale single‐crystalline ultrathin boron nanosheets (UBNSs, ≈10 nm) are fabricated through an effective vapor–solid process via thermal decomposition of diborane. The UBNSs have obvious advantages over thicker boron nanomaterials in many aspects. Specifically, the UBNSs demonstrate excellent field emission performances with a low turn‐on field, E to, of 3.60 V μm−1 and a good stability. Further, the dependence of (turn‐on field) E to/(threshold field) E thr and effective work function, Φ e, on temperature is investigated and the possible mechanism of temperature‐dependent field emission phenomenon has been discussed. Moreover, electronic transport in a single UBNS reveals it to be an intrinsic p‐type semiconductor behavior with carrier mobility about 1.26 × 10−1 cm2 V−1 s−1, which is the best data in reported works. Interestingly, a multiconductive mechanism coexisting phenomenon has been explored based on the study of temperature‐dependent conductivity behavior of the UBNSs. Besides, the photodetector device fabricated from single‐crystalline UBNS demonstrates good sensitivity, reliable stability, and fast response, obviously superior to other reported boron nanomaterials. Such superior electronic‐optical performances are originated from the high quality of single crystal and large specific surface area of the UBNSs, suggesting the potential applications of the UBNSs in field‐emitters, interconnects, integrated circuits, and optoelectronic devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Using the state before parallel relaxation as reference, we express the total force per unit length in term of strain, Eq. (7) indicates that the first, second and third order force coefficients:…”

Section: Resultsmentioning

confidence: 99%

“…The observed highest value of fracture strength was 53.4 GPa, approaching the theoretical strength of the 10% of Young's modulus of the material. Using in situ high-resolution transmission electron microscopy (HRTEM), Liu et al [7] conducted tensile and bending tests on individual boron NWs. The tensile test results gave the mean fracture strength and the maximum strain of the individual boron NWs to be 10.4 GPa and 4.1%, respectively.…”

mentioning

confidence: 99%

Surface-induced size-dependent ultimate tensile strength of thin films

et al. 2015

View full text Add to dashboard Cite

“…As illustrated in Figure 1a, BNWs were uniformly grown on the substrate of CFC. [24][25][26] Moreover, the corresponding diffraction spots in the inset (acquired from the same nanowire) are very clear, indicating that the nanowire is a single crystalline BNWs. Typical TEM image confirms the structure of as-fabricated BNWs possess a diameter around 95 nm (Figure 1d).…”

Section: Characterization Of Bnws-cfcmentioning

confidence: 99%

Boron Element Nanowires Electrode for Supercapacitors

Xue

Gan

Huang

et al. 2018

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

attention as ideal energy storage devices owing to their excellent power density, high safety, quick charging/discharging, and good cycling stability. [7][8][9][10][11][12][13] A research frontier is to develop flexible supercapacitors with good electrochemical and mechanical performance, where the integration of flexibility in supercapacitors is of great importance for powering various flexible electronics and enabling applications in multifunctional flexible electronics. [11,[14][15][16][17] Notably, the electrode material is the most crucial component for a supercapacitor, which directly determines the performance of supercapacitors. Electrical double-layer capacitors (EDLCs) suffer from the low specific capacitance which constitutes a huge obstacle for increasing the energy density, whereas pseudocapacitors possess the higher specific capacitance but are confined by relatively poor cycling stability and long discharging time. [1,14,18] So far, intensive efforts are aimed at improving the performance of supercapacitor based on traditional active materials including carbon-based material, transitional metal-based material, and conducting polymers. [1][2][3][4]7,8,19] Although some novel materials, including sulfides, selenides, etc., have been proposed to be supercapacitive materials, the pursuit of new categories of active materials as electrodes of supercapacitors remains a great challenge. [20][21][22] Recently, Jiang and co-workers theoretically predicted the superior capacitive performance of 2D boron sheets, which exhibit specific capacitance on the order of 400 F g −1 owing to their metallicity and low weight, suggesting boron element might be a potential electrode material of supercapacitors. [23] Unfortunately, so far, the desired experimental work on any materials based on boron element for supercapacitor has not been reported.Herein, we report a new category of supercapacitor materials: boron element nanowires (BNWs). Single-crystal BNWs were synthesized through a cost-effective chemical vapor deposition (CVD) method. Surprisingly, the as-prepared BNWs demonstrate high stability and promising capacitance in all alkaline, neutral, and acid aqueous electrolytes. Especially, in an H 2 SO 4 electrolyte, the BNWs on a carbon fiber cloth (CFC) substrate achieved a capacitance up to 60.2 mF cm −2 . Moreover, to understand the mechanism of capacitance in BNWs-CFCs, we studied the electrochemically charge/discharge processes of BNWs-CFC electrodes in three different electrolytes, which reveals different The pursuit of new categories of active materials as electrodes of supercapacitors remains a great challenge. Herein, for the first time, elemental boron as a superior electrode material of supercapacitors is reported, which exhibits significantly high capacitances and excellent rate performance in all alkaline, neutral, and acidic electrolytes. Notably, boron nanowire-carbon fiber cloth (BNWs-CFC) electrodes achieve a capacitance up to 42.8 mF cm −2 at a scan rate of 5 mV s −1 and 60.2 mF cm −2 at a current d...

show abstract

Individual Boron Nanowire Has Ultra-High Specific Young’s Modulus and Fracture Strength As Revealed by in Situ Transmission Electron Microscopy

Cited by 34 publications

References 43 publications

Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances

Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances

Surface-induced size-dependent ultimate tensile strength of thin films

Boron Element Nanowires Electrode for Supercapacitors

Contact Info

Product

Resources

About