曾海波
博士 教授 博士生导师
南京理工大学 纳米光电材料研究所
长期从事量子点与二维发光显示材料及器件研究
个性化签名
- 姓名:曾海波
- 目前身份:在职研究人员
- 担任导师情况:博士生导师
- 学位:博士
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学术头衔:
博士生导师
- 职称:高级-教授
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学科领域:
半导体技术
- 研究兴趣:长期从事量子点与二维发光显示材料及器件研究
曾海波,1977年出生,现为南京理工大学教授、博导、学术委员会委员,Elsevier出版社《Current Applied Physics》编辑,首批国家优秀青年基金获得者(2012)。2006年中科院固体物理所获博士学位,先后工作于德国卡尔斯鲁厄大学、日本国家材料科学研究所,2013年创建南理工纳米光电材料研究所,2016年创建工信部新型显示材料与器件重点实验室。
长期从事量子点与二维发光显示材料及器件研究,主持了国家自然科学基金4项、973课题1项,代表性成果有:提出了氧化锌蓝色发光的间隙锌缺陷态机制(Adv. Funct. Mater. 2010, 20, 561),单篇研究论文获引用700余次,作为代表作获得安徽省科技一等奖(2012);首创了全无机钙钛矿全彩发光二极管(Adv. Mater. 2015, 27, 7162),被Nature Nanotechnology评论为“首次(first)”、“打破了(break)镉系壁垒”、“开启了(opened)无机钙钛矿LED”,作为代表作获得中国颗粒学会科技进步二等奖(2016);提出了锑烯及其衍生二维发光材料概念(Angew. Chem. 2015, 54, 3112),被Nature专题报道为“新型蓝光LED二维材料”。共发表SCI论文160余篇,他引6000余次。创建南理工光电材料所以来,发表第一/通讯作者SCI论文100余篇,ESI-1%高被引论文14篇,ESI-1‰热点论文5篇,影响因子大于10期刊论文30篇,包括Adv. Mater. 6篇、Adv. Funct. Mater. 9篇、NPG Asia Mater. 2篇、Nano Letters 4篇、Angew. Chem. Int. Ed. 6篇、Nano Energy 3篇。
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成果数
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J. Phys. Chem. B,2005,109(39):18260–1826
2005年09月10日
We present composition-controlled synthesis of ZnO−Zn composite nanoparticles by laser ablation of a zinc metal target in pure water or in aqueous solution of sodium dodecyl sulfate (SDS). By SDS concentration, composition and size of the nanoparticles can be controlled in a wide range. Relative amounts of the components Zn and ZnO, the particle size, and the microstructure can evolve with SDS concentration in solution. High SDS concentration corresponds to high relative amount of Zn nanoparticles existing as the core in the core/shell nanostructures, whereas low SDS concentration leads to high ZnO amount. This was explained by a dynamic mechanism on the basis of the competition between aqueous oxidation and SDS capping protection. Correspondingly, optical absorption spectra evolve from the excitonic peak of ZnO (about 350 nm) to the Zn surface plasmon resonance (about 242 nm) with rise of SDS concentration. A blue (about 450 nm) photoluminescence was observed in the obtained ZnO nanoparticles, which was attributed to existence of interstitial zinc in ZnO lattices. This study has revealed that laser ablation of active metal in liquid media is an appropriate method to synthesize a series of metal oxide semiconductor−metal composite nanoparticles with controlled composition and size.
Zinc,, Oxides,, Sodium dodecyl sulfate,, Nanoparticles,, Metal oxide nanoparticles
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Appl. Phys. Lett.,2006,88():171910
2006年04月27日
A strong violet photoluminescence (PL) band at 425nm (2.92eV) was observed from the ZnO shell layer of the Zn∕ZnO core-shell nanoparticles prepared by laser ablation in liquid media. Such violet PL decreases with increase of the shell thickness or annealing temperature, showing good controllability. Based on the electron paramagnetic resonance measurements, the violet emission is attributed to the electronic transition from the defect level, corresponding to high-concentration zinc interstitials, to the valence band. This study is in favor to clarify the defect-related emissions and to extend the optical and electronic applications of nanostructured ZnO.
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【期刊论文】Controllable Pt/ZnO Porous Nanocages with Improved Photocatalytic Activity
J. Phys. Chem. C,2008,112(49):19620–1962
2008年11月14日
Composite Pt/ZnO porous nanocages with ultrathin porous ZnO shell layers and ultrafine embedded Pt nanoparticles were facilely fabricated by ultrasonic irradiation-assisted two-step etching of Zn/ZnO core/shell nanoparticle colloids. The Pt cluster size can be well adjusted by the applied ultrasonic power. These Pt/ZnO nanocages exhibit excellent photocatalytic performance and can be further improved by the control of the embedded noble metal nanoparticles, which can be attributed to the abundant nanoscale Schottky contacts in the Pt−ZnO metal−semiconductor interfaces as well as to the large specific surface area due to the unique porous structure. The selective etching route used here could be of considerable universality for fabrication of a series of noble metal/oxide porous nanostructures as photocatalysts, such as the (Au, Ag, Pt, Pd)/(ZnO, TiO2) system.
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ACS Nano,2008,2(8):1661–1670
2008年07月12日
A weak acid selective etching strategy was put forward to fabricate oxide-based hollow nanoparticles (HNPs) using core/shell nanostructures of active metal/oxide nanoparticles as sacrificial templates. ZnO-based HNPs, including pure ZnO, Au/ZnO, Pt/ZnO, and Au/Pt/ZnO HNPs with diameter below 50 nm and shell thickness below 6 nm has been first achieved at low temperature. The diameter, thickness, and even sizes of ZnO and noble metal ultrafine crystals of HNPs can be well adjusted by the etching process. Synchronous with the formation of HNPs, the internal metal−semiconductor interfaces can be controllably eliminated (Zn−ZnO) and reconstructed (noble metal−ZnO). Excitingly, such microstructure manipulation has endued them with giant improvements in related performances, including the very strong blue luminescence with enhancement over 3 orders of magnitude for the pure ZnO HNPs and the greatly improved photocatalytic activity for the noble metal/ZnO HNPs. These give them strong potentials in relevant applications, such as blue light emitting devices, environment remediation, drug delivery and release, energy storage and conversion, and sensors. The designed fabrication procedure is simple, feasible, and universal for a series of oxide and noble metal/oxide HNPs with controlled microstructure and improved performances.
ZnO hollow nanoparticles selective etching metal–semiconductor interface luminescence photocatalysis
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Advanced Functional Materials,2009,19(19):3165-3172
2009年10月05日
Here, a facile and effective route toward full control of vertical ZnO nanorod (NR)/nanowire (NW) arrays in centimeter‐scale areas and considerable improvement of field‐emission (FE) performance is reported. Controlled deformation of colloidal crystal monolayer templates is introduced by heating near glass‐transition temperature. The NR/NW density, uniformity, and tapering were all adjusted through selection of template size and deformation, and electrolyte composition. In line with the adjustments, the field‐emission performance of the arrays is significantly improved. A low turn‐on electric field of 1.8 V µm−1, a field‐enhancement factor of up to 5 750, and an emitting current density of up to 2.5 mA cm−2 were obtained. These improved parameters would benefit their potential application in cold‐cathode‐based electronics.
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【期刊论文】“White Graphenes”: Boron Nitride Nanoribbons via Boron Nitride Nanotube Unwrapping
Nano Lett.,2010,10(12):5049–5055
2010年10月28日
Inspired by rich physics and functionalities of graphenes, scientists have taken an intensive interest in two-dimensional (2D) crystals of h-BN (analogue of graphite, so-called “white” graphite). Recent calculations have predicted the exciting potentials of BN nanoribbons in spintronics due to tunable magnetic and electrical properties; however no experimental evidence has been provided since fabrication of such ribbons remains a challenge. Here, we show that few- and single-layered BN nanoribbons, mostly terminated with zigzag edges, can be produced under unwrapping multiwalled BN nanotubes through plasma etching. The interesting stepwise unwrapping and intermediate states were observed and analyzed. Opposed to insulating primal tubes, the nanoribbons become semiconducting due to doping-like conducting edge states and vacancy defects, as revealed by structural analyses and ab initio simulations. This study paves the way for BN nanoribbon production and usage as functional semiconductors with a wide range of applications in optoelectronics and spintronics.
“White graphene” boron nitride (, BN), nanoribbon nanosheet two-dimensional crystal
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Advanced Functional Materials,2010,20(4):561-572
2010年02月12日
High concentrations of defects are introduced into nanoscale ZnO through non‐equilibrium processes and resultant blue emissions are comprehensively analyzed, focusing on defect origins and broad controls. Some ZnO nanoparticles exhibit very strong blue emissions, the intensity of which first increase and then decrease with annealing. These visible emissions exhibit strong and interesting excitation dependences: 1) the optimal excitation energy for blue emissions is near the bandgap energy, but the effective excitation can obviously be lower, even 420 nm (2.95 eV < Eg = 3.26 eV); in contrast, green emissions can be excited only by energies larger than the bandgap energy; and, 2) there are several fixed emitting wavelengths at 415, 440, 455 and 488 nm in the blue wave band, which exhibit considerable stability in different excitation and annealing conditions. Mechanisms for blue emissions from ZnO are proposed with interstitial‐zinc‐related defect levels as initial states. EPR spectra reveal the predominance of interstitial zinc in as‐prepared samples, and the evolutions of coexisting interstitial zinc and oxygen vacancies with annealing. Furthermore, good controllability of visible emissions is achieved, including the co‐emission of blue and green emissions and peak adjustment from blue to yellow.
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【期刊论文】Nanomaterials via Laser Ablation/Irradiation in Liquid: A Review
Advanced Functional Materials,2012,22(7):1333-1353
2012年02月06日
Laser ablation of solid targets in the liquid medium can be realized to fabricate nanostructures with various compositions (metals, alloys, oxides, carbides, hydroxides, etc.) and morphologies (nanoparticles, nanocubes, nanorods, nanocomposites, etc.). At the same time, the post laser irradiation of suspended nanomaterials can be applied to further modify their size, shape, and composition. Such fabrication and modification of nanomaterials in liquid based on laser irradiation has become a rapidly growing field. Compared to other, typically chemical, methods, laser ablation/irradiation in liquid (LAL) is a simple and “green” technique that normally operates in water or organic liquids under ambient conditions. Recently, the LAL has been elaborately developed to prepare a series of nanomaterials with special morphologies, microstructures and phases, and to achieve one‐step formation of various functionalized nanostructures in the pursuit of novel properties and applications in optics, display, detection, and biological fields. The formation mechanisms and synthetic strategies based on LAL are systematically analyzed and the reported nanostructures derived from the unique characteristics of LAL are highlighted along with a review of their applications and future challenges.
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【期刊论文】Two-dimensional semiconductors: recent progress and future perspectives
J. Mater. Chem. C,2013,(1):2952-2969
2013年01月28日
Graphene with a sp2-honeycomb carbon lattice has drawn a large amount of attention due to its excellent properties and potential applications in many fields. Similar to the structure of graphene, two-dimensional semiconductors are its two-dimensional and isostructural counterparts based on the typical layer-structured semiconductors, such as boron nitride (h-BN) and transition metal dichalcogenides (e.g. MoS2 and WS2), whose layers are bound by weak van der Waals forces. Unlike the semi-metal features of graphene, the two-dimensional semiconductors are natural semiconductors with thicknesses on the atomic scale. When one of the dimensions is extremely reduced, the two-dimensional semiconductors exhibit some unique properties, such as a transition from indirect to direct semiconductor properties, and hence have great potential for applications in electronics, energy storage, sensors, catalysis and composites, which arise both from the dimension-reduced effect and from the modified electronic structure. In this feature article, recent developments in the synthesis, properties and applications of two-dimensional semiconductors are discussed. The reported virtues and novelties of two-dimensional semiconductors are highlighted and the current problems in their developing process are clarified, in addition to their challenges and future prospects.
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【期刊论文】Epitaxial ZnO Nanowire‐on‐Nanoplate Structures as Efficient and Transferable Field Emitters
Advanced Materials,2013,25(40):5750-5755
2013年07月29日
Highly epitaxial ZnO nanowire‐on‐nanoplate structures as efficient and transferable electron field emitters are reported here. Well‐faceted ZnO nanoplates can be used as efficient substrates for the epitaxial growth of nanowires with a sharp and high‐quality interface, which significantly improves its field emitter performance. Because of its scalable preparation, high performance and facile transfer, the novel material is of high potential for applications in various optoelectronic devices.
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