当前位置： SCI文献检索 > Science Advances期刊下所有文献 > Dipole-like electrostatic asymmetry of gold nanorods.

Dipole-like electrostatic asymmetry of gold nanorods.

Abstract：

:The symmetry of metallic nanocolloids, typically envisaged as simple geometrical shapes, is rarely questioned. However, the symmetry considerations are so essential for understanding their electronic structure, optical properties, and biological effects that it is important to reexamine these foundational assumptions for nanocolloids. Gold nanorods (AuNRs) are generally presumed to have nearly perfect geometry of a cylinder and therefore are centrosymmetric. We show that AuNRs, in fact, have a built-in electrostatic potential gradient on their surface and behave as noncentrosymmetric particles. The electrostatic potential gradient of 0.11 to 0.07 V/nm along the long axes of nanorods is observed by off-axis electron holography. Kelvin probe microscopy, secondary electron imaging, energy-filtered transmission electron microscopy, and plasmon mapping reveal that the axial asymmetry is associated with a consistently unequal number of cetyltrimethylammonium bromide moieties capping the two ends of the AuNRs. Electrostatic field maps simulated for the AuNR surface reproduce the holography images. The dipole-like surface potential gradient explains previously puzzling discrepancies in nonlinear optical effects originating from the noncentrosymmetric nature of AuNRs. Similar considerations of symmetry breaking are applicable to other nanoscale structures for which the property-governing symmetry of the organic shell may differ from the apparent symmetry of inorganic core observed in standard electron microscopy images.

journal_name

Sci Adv

journal_title

Science advances

authors

Kim JY,Han MG,Lien MB,Magonov S,Zhu Y,George H,Norris TB,Kotov NA

doi

10.1126/sciadv.1700682

subject

Has Abstract

pub_date

2018-02-09 00:00:00

pages

e1700682

issue

2

issn

2375-2548

pii

1700682

journal_volume

4

pub_type

杂志文章

相关文献

Science Advances文献大全
  • Compression of dynamic tactile information in the human hand.

    abstract：:A key problem in the study of the senses is to describe how sense organs extract perceptual information from the physics of the environment. We previously observed that dynamic touch elicits mechanical waves that propagate throughout the hand. Here, we show that these waves produce an efficient encoding of tactile inf...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aaz1158

    authors： Shao Y,Hayward V,Visell Y

    更新日期：2020-04-15 00:00:00

  • Melanoma topology reveals a stem-like phenotype that promotes angiogenesis.

    abstract：:Tumor angiogenesis provides critical nutrients for cancer progression and may also facilitate pathways for dissemination during the process of metastasis. It is well established that cells that metastasize display characteristics of stem cells; however, the prevailing paradigm points to these stem-like cells residing ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1701350

    authors： Lee J,Abdeen AA,Hedhli J,Wycislo KL,Dobrucka IT,Fan TM,Dobrucki LW,Kilian KA

    更新日期：2017-10-25 00:00:00

  • Emergence of an equatorial mode of climate variability in the Indian Ocean.

    abstract：:Presently, the Indian Ocean (IO) resides in a climate state that prevents strong year-to-year climate variations. This may change under greenhouse warming, but the mechanisms remain uncertain, thus limiting our ability to predict future changes in climate extremes. Using climate model simulations, we uncover the emerg...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aay7684

    authors： DiNezio PN,Puy M,Thirumalai K,Jin FF,Tierney JE

    更新日期：2020-05-06 00:00:00

  • Ultrahydrophobic 3D/2D fluoroarene bilayer-based water-resistant perovskite solar cells with efficiencies exceeding 22.

    abstract：:Preventing the degradation of metal perovskite solar cells (PSCs) by humid air poses a substantial challenge for their future deployment. We introduce here a two-dimensional (2D) A2PbI4 perovskite layer using pentafluorophenylethylammonium (FEA) as a fluoroarene cation inserted between the 3D light-harvesting perovski...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aaw2543

    authors： Liu Y,Akin S,Pan L,Uchida R,Arora N,Milić JV,Hinderhofer A,Schreiber F,Uhl AR,Zakeeruddin SM,Hagfeldt A,Dar MI,Grätzel M

    更新日期：2019-06-07 00:00:00

  • Deep-reaching acceleration of global mean ocean circulation over the past two decades.

    abstract：:Ocean circulation redistributes Earth's energy and water masses and influences global climate. Under historical greenhouse warming, regional ocean currents show diverse tendencies, but whether there is an emerging trend of the global mean ocean circulation system is not yet clear. Here, we show a statistically signifi...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aax7727

    authors： Hu S,Sprintall J,Guan C,McPhaden MJ,Wang F,Hu D,Cai W

    更新日期：2020-02-05 00:00:00

  • Giant Rashba splitting in 2D organic-inorganic halide perovskites measured by transient spectroscopies.

    abstract：:Two-dimensional (2D) layered hybrid organic-inorganic halide perovskite semiconductors form natural "multiple quantum wells" that have strong spin-orbit coupling due to the heavy elements in their building blocks. This may lead to "Rashba splitting" close to the extrema in the electron bands. We have used a plethora o...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1700704

    authors： Zhai Y,Baniya S,Zhang C,Li J,Haney P,Sheng CX,Ehrenfreund E,Vardeny ZV

    更新日期：2017-07-28 00:00:00

  • Mass spectrometry imaging identifies abnormally elevated brain l-DOPA levels and extrastriatal monoaminergic dysregulation in l-DOPA-induced dyskinesia.

    abstract：:l-DOPA treatment for Parkinson's disease frequently leads to dyskinesias, the pathophysiology of which is poorly understood. We used MALDI-MSI to map the distribution of l-DOPA and monoaminergic pathways in brains of dyskinetic and nondyskinetic primates. We report elevated levels of l-DOPA, and its metabolite 3-O-met...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.abe5948

    authors： Fridjonsdottir E,Shariatgorji R,Nilsson A,Vallianatou T,Odell LR,Schembri LS,Svenningsson P,Fernagut PO,Crossman AR,Bezard E,Andrén PE

    更新日期：2021-01-06 00:00:00

  • The long noncoding RNA neuroLNC regulates presynaptic activity by interacting with the neurodegeneration-associated protein TDP-43.

    abstract：:The cellular and the molecular mechanisms by which long noncoding RNAs (lncRNAs) may regulate presynaptic function and neuronal activity are largely unexplored. Here, we established an integrated screening strategy to discover lncRNAs implicated in neurotransmitter and synaptic vesicle release. With this approach, we ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aay2670

    authors： Keihani S,Kluever V,Mandad S,Bansal V,Rahman R,Fritsch E,Gomes LC,Gärtner A,Kügler S,Urlaub H,Wren JD,Bonn S,Rizzoli SO,Fornasiero EF

    更新日期：2019-12-18 00:00:00

  • Accelerated evolution of a minimal 63-amino acid dual transcription factor.

    abstract：:Transcription factors control gene expression in all life. This raises the question of what is the smallest protein that can support such activity. In nature, Cro from bacteriophage λ is one of the smallest known repressors (66 amino acids), and activators are typically much larger (e.g., λ cI, 237 amino acids). Previ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aba2728

    authors： Brödel AK,Rodrigues R,Jaramillo A,Isalan M

    更新日期：2020-06-10 00:00:00

  • Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars.

    abstract：:It has been proposed that Mars' moons formed from a disk produced by a large impact with the planet. However, whether such an event could produce tiny Phobos and Deimos remains unclear. Using a hybrid N-body model of moon accumulation that includes a full treatment of moon-moon dynamical interactions, we first identif...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aar6887

    authors： Canup R,Salmon J

    更新日期：2018-04-18 00:00:00

  • Overlooked possibility of a collapsed Atlantic Meridional Overturning Circulation in warming climate.

    abstract：:Changes in the Atlantic Meridional Overturning Circulation (AMOC) are moderate in most climate model projections under increasing greenhouse gas forcing. This intermodel consensus may be an artifact of common model biases that favor a stable AMOC. Observationally based freshwater budget analyses suggest that the AMOC ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1601666

    authors： Liu W,Xie SP,Liu Z,Zhu J

    更新日期：2017-01-04 00:00:00

  • A two-dimensional semiconductor transistor with boosted gate control and sensing ability.

    abstract：:Transistors with exfoliated two-dimensional (2D) materials on a SiO2/Si substrate have been applied and have been proven effective in a wide range of applications, such as circuits, memory, photodetectors, gas sensors, optical modulators, valleytronics, and spintronics. However, these devices usually suffer from limit...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1602246

    authors： Xu J,Chen L,Dai YW,Cao Q,Sun QQ,Ding SJ,Zhu H,Zhang DW

    更新日期：2017-05-19 00:00:00

  • Unraveling the storage mechanism in organic carbonyl electrodes for sodium-ion batteries.

    abstract：:Organic carbonyl compounds represent a promising class of electrode materials for secondary batteries; however, the storage mechanism still remains unclear. We take Na2C6H2O4 as an example to unravel the mechanism. It consists of alternating Na-O octahedral inorganic layer and π-stacked benzene organic layer in spatia...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1500330

    authors： Wu X,Jin S,Zhang Z,Jiang L,Mu L,Hu YS,Li H,Chen X,Armand M,Chen L,Huang X

    更新日期：2015-09-18 00:00:00

  • Cryogenian evolution of stigmasteroid biosynthesis.

    abstract：:Sedimentary hydrocarbon remnants of eukaryotic C26-C30 sterols can be used to reconstruct early algal evolution. Enhanced C29 sterol abundances provide algal cell membranes a density advantage in large temperature fluctuations. Here, we combined a literature review with new analyses to generate a comprehensive invento...

    journal_title：Science advances

    pub_type： 杂志文章,评审

    doi：10.1126/sciadv.1700887

    authors： Hoshino Y,Poshibaeva A,Meredith W,Snape C,Poshibaev V,Versteegh GJM,Kuznetsov N,Leider A,van Maldegem L,Neumann M,Naeher S,Moczydłowska M,Brocks JJ,Jarrett AJM,Tang Q,Xiao S,McKirdy D,Das SK,Alvaro JJ,Sansjofre P,

    更新日期：2017-09-20 00:00:00

  • RNA binding activates RIG-I by releasing an autorepressed signaling domain.

    abstract：:The retinoic acid-inducible gene I (RIG-I) innate immune receptor is an important immunotherapeutic target, but we lack approaches for monitoring the physical basis for its activation in vitro. This gap in our understanding has led to confusion about mechanisms of RIG-I activation and difficulty discovering agonists a...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aax3641

    authors： Dickey TH,Song B,Pyle AM

    更新日期：2019-10-02 00:00:00

  • p63 establishes epithelial enhancers at critical craniofacial development genes.

    abstract：:The transcription factor p63 is a key mediator of epidermal development. Point mutations in p63 in patients lead to developmental defects, including orofacial clefting. To date, knowledge on how pivotal the role of p63 is in human craniofacial development is limited. Using an inducible transdifferentiation model, comb...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aaw0946

    authors： Lin-Shiao E,Lan Y,Welzenbach J,Alexander KA,Zhang Z,Knapp M,Mangold E,Sammons M,Ludwig KU,Berger SL

    更新日期：2019-05-01 00:00:00

  • Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe.

    abstract：:Local thermal magnetization fluctuations in Li-doped MnTe are found to increase its thermopower α strongly at temperatures up to 900 K. Below the Néel temperature (TN ~ 307 K), MnTe is antiferromagnetic, and magnon drag contributes αmd to the thermopower, which scales as ~T3. Magnon drag persists into the paramagnetic...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aat9461

    authors： Zheng Y,Lu T,Polash MMH,Rasoulianboroujeni M,Liu N,Manley ME,Deng Y,Sun PJ,Chen XL,Hermann RP,Vashaee D,Heremans JP,Zhao H

    更新日期：2019-09-13 00:00:00

  • Complex dewetting scenarios of ultrathin silicon films for large-scale nanoarchitectures.

    abstract：:Dewetting is a ubiquitous phenomenon in nature; many different thin films of organic and inorganic substances (such as liquids, polymers, metals, and semiconductors) share this shape instability driven by surface tension and mass transport. Via templated solid-state dewetting, we frame complex nanoarchitectures of mon...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aao1472

    authors： Naffouti M,Backofen R,Salvalaglio M,Bottein T,Lodari M,Voigt A,David T,Benkouider A,Fraj I,Favre L,Ronda A,Berbezier I,Grosso D,Abbarchi M,Bollani M

    更新日期：2017-11-10 00:00:00

  • Universal SMP gripper with massive and selective capabilities for multiscaled, arbitrarily shaped objects.

    abstract：:Grippers are widely used for the gripping, manipulation, and assembly of objects with a wide range of scales, shapes, and quantities in research, industry, and our daily lives. A simple yet universal solution is very challenging. Here, we manage to address this challenge utilizing a simple shape memory polymer (SMP) b...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aay5120

    authors： Linghu C,Zhang S,Wang C,Yu K,Li C,Zeng Y,Zhu H,Jin X,You Z,Song J

    更新日期：2020-02-14 00:00:00

  • Distinct distributed patterns of neural activity are associated with two languages in the bilingual brain.

    abstract：:A large body of previous neuroimaging studies suggests that multiple languages are processed and organized in a single neuroanatomical system in the bilingual brain, although differential activation may be seen in some studies because of different proficiency levels and/or age of acquisition of the two languages. Howe...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1603309

    authors： Xu M,Baldauf D,Chang CQ,Desimone R,Tan LH

    更新日期：2017-07-12 00:00:00

  • Elastic properties of silicate melts: Implications for low velocity zones at the lithosphere-asthenosphere boundary.

    abstract：:Low seismic velocity regions in the mantle and crust are commonly attributed to the presence of silicate melts. Determining melt volume and geometric distribution is fundamental to understanding planetary dynamics. We present a new model for seismic velocity reductions that accounts for the anomalous compressibility o...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1701312

    authors： Clark AN,Lesher CE

    更新日期：2017-12-13 00:00:00

  • PRDM15 loss of function links NOTCH and WNT/PCP signaling to patterning defects in holoprosencephaly.

    abstract：:Holoprosencephaly (HPE) is a congenital forebrain defect often associated with embryonic lethality and lifelong disabilities. Currently, therapeutic and diagnostic options are limited by lack of knowledge of potential disease-causing mutations. We have identified a new mutation in the PRDM15 gene (C844Y) associated wi...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aax9852

    authors： Mzoughi S,Di Tullio F,Low DHP,Motofeanu CM,Ong SLM,Wollmann H,Wun CM,Kruszka P,Muenke M,Hildebrandt F,Dunn NR,Messerschmidt DM,Guccione E

    更新日期：2020-01-10 00:00:00

  • A self-illuminating nanoparticle for inflammation imaging and cancer therapy.

    abstract：:Nanoparticles have been extensively used for inflammation imaging and photodynamic therapy of cancer. However, the major translational barriers to most nanoparticle-based imaging and therapy applications are the limited depth of tissue penetration, inevitable requirement of external irradiation, and poor biocompatibil...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aat2953

    authors： Xu X,An H,Zhang D,Tao H,Dou Y,Li X,Huang J,Zhang J

    更新日期：2019-01-09 00:00:00

  • Touch-induced seedling morphological changes are determined by ethylene-regulated pectin degradation.

    abstract：:How mechanical forces regulate plant growth is a fascinating and long-standing question. After germination underground, buried seedlings have to dynamically adjust their growth to respond to mechanical stimulation from soil barriers. Here, we designed a lid touch assay and used atomic force microscopy to investigate t...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.abc9294

    authors： Wu Q,Li Y,Lyu M,Luo Y,Shi H,Zhong S

    更新日期：2020-11-27 00:00:00

  • Metal-free activation of molecular oxygen by covalent triazine frameworks for selective aerobic oxidation.

    abstract：:Oxygen activation is a critical step in ubiquitous heterogeneous oxidative processes, most prominently in catalysis, electrolysis, and pharmaceutical applications. We present here our findings on metal-free O2 activation on covalent triazine frameworks (CTFs) as an important class of N-rich materials. The O2 activatio...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aaz2310

    authors： Abednatanzi S,Gohari Derakhshandeh P,Leus K,Vrielinck H,Callens F,Schmidt J,Savateev A,Van Der Voort P

    更新日期：2020-04-03 00:00:00

  • Effects of conservation policy on China's forest recovery.

    abstract：:Forest loss is one of the most pervasive land surface transformations on Earth, with drastic effects on global climate, ecosystems, and human well-being. As part of biodiversity conservation and climate change mitigation efforts, many countries, including China, have been implementing large-scale policies to conserve ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.1500965

    authors： Viña A,McConnell WJ,Yang H,Xu Z,Liu J

    更新日期：2016-03-18 00:00:00

  • Could revenue recycling make effective carbon taxation politically feasible?

    abstract：:Carbon taxes are widely regarded as a potentially effective and economically efficient policy instrument for decarbonizing the global energy supply and thus limiting global warming. The main obstacle is political feasibility because of opposition from citizens and industry. Earmarking revenues from carbon taxation for...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aax3323

    authors： Beiser-McGrath LF,Bernauer T

    更新日期：2019-09-18 00:00:00

  • Allosteric modulation of nucleoporin assemblies by intrinsically disordered regions.

    abstract：:Intrinsically disordered regions (IDRs) of proteins are implicated in key macromolecular interactions. However, the molecular forces underlying IDR function within multicomponent assemblies remain elusive. By combining thermodynamic and structural data, we have discovered an allostery-based mechanism regulating the so...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aax1836

    authors： Blus BJ,Koh J,Krolak A,Seo HS,Coutavas E,Blobel G

    更新日期：2019-11-27 00:00:00

  • Finite-temperature violation of the anomalous transverse Wiedemann-Franz law.

    abstract：:The Wiedemann-Franz (WF) law has been tested in numerous solids, but the extent of its relevance to the anomalous transverse transport and the topological nature of the wave function, remains an open question. Here, we present a study of anomalous transverse response in the noncollinear antiferromagnet Mn3Ge extended ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aaz3522

    authors： Xu L,Li X,Lu X,Collignon C,Fu H,Koo J,Fauqué B,Yan B,Zhu Z,Behnia K

    更新日期：2020-04-24 00:00:00

  • Dynamically controllable polarity modulation of MoTe2 field-effect transistors through ultraviolet light and electrostatic activation.

    abstract：:Energy band engineering is of fundamental importance in nanoelectronics. Compared to chemical approaches such as doping and surface functionalization, electrical and optical methods provide greater flexibility that enables continuous, reversible, and in situ band tuning on electronic devices of various kinds. In this ...

    journal_title：Science advances

    pub_type： 杂志文章

    doi：10.1126/sciadv.aav3430

    authors： Wu E,Xie Y,Zhang J,Zhang H,Hu X,Liu J,Zhou C,Zhang D

    更新日期：2019-05-03 00:00:00