Volume 566 Issue 7745, 28 February 2019

Colour creation

The vibrant colours seen on butterfly wings or peacock feathers are examples of structural coloration, which occurs when micro- or nanoscale structured surfaces interfere with visible light. In this week’s issue, Lauren Zarzar and her colleagues reveal a previously unrecognized mechanism for generating structural iridescent colour from droplets of colourless liquid. The researchers found that micrometre-scale droplets suspended on the back of a transparent Petri dish, or multiphase droplets, reflect coloured light from their edges when illuminated with a beam of white light. The effect is not produced by material dispersion, as might be thought, but by an optical phenomenon based on interference of light that undergoes total internal reflection along the curved surface of the droplet. By varying the length and curvature of this interface, the researchers were able to control the colours generated, and by patterning droplets in a 2D array they managed to create pixelated images.

Cover image: Sara Nagelberg

This Week

News in Focus

Comment

Technology

    Toolbox

  • Technology Feature

  • Technology Feature |

    The extracellular matrix governs a surprising number of cellular functions. New techniques are revealing how cells and matrix communicate — and why this cross-talk matters.

    • Jyoti Madhusoodanan

    Collection:

Careers

Futures

Research

    News & Views

  • News & Views |

    Iridescent colours have been observed to be reflected from specially designed droplets of colourless liquids, with the reflected colour depending on the viewing angle. The finding reveals a curious mechanism for creating coloration.

    • Kenneth Chau
  • News & Views |

    When cancer spreads, this metastatic stage of the disease is usually lethal. An analysis of immune cells that cluster with tumour cells in the bloodstream illuminates a partnership that might aid metastasis.

    • Mikala Egeblad
    •  & Karin E. de Visser
  • News & Views |

    Quantum computers require controlled encoding to protect computations from environmental noise. Two experiments have achieved such encoding using what are known as infinite-dimensional quantum systems.

    • Alessandro Ferraro
  • News & Views |

    How Nature reported preparations for the Moon landing in 1969, and a rare archaeological find in 1919.

  • News & Views |

    Failed chemical reactions are often not reported, which means that vast amounts of potentially useful data are going to waste. Experiments show that machine learning can use such data to optimize the preparation of porous materials.

    • Seth Cohen
  • News & Views |

    Studies of multiple sclerosis have long focused on the white matter of the brain. Insights into how immune cells target the brain’s grey matter now illuminate the stage of the disease at which neurodegeneration occurs.

    • Jenna L. Pappalardo
    •  & David A. Hafler
  • Reviews

  • Review Article |

    Combining mobile phone technologies with infectious disease diagnostics can increase patients’ access to testing and treatment and provide public health authorities with new ways to monitor and control outbreaks of infectious diseases.

    • Christopher S. Wood
    • , Michael R. Thomas
    • , Jobie Budd
    • , Tivani P. Mashamba-Thompson
    • , Kobus Herbst
    • , Deenan Pillay
    • , Rosanna W. Peeling
    • , Anne M. Johnson
    • , Rachel A. McKendry
    •  & Molly M. Stevens

    Collection:

  • Articles

  • Article |

    Topological materials are thought to be scarce, but an algorithm that diagnoses nontrivial topology in nonmagnetic materials finds the opposite: more than 30 per cent of the 26,688 materials studied are topological.

    • Tiantian Zhang
    • , Yi Jiang
    • , Zhida Song
    • , He Huang
    • , Yuqing He
    • , Zhong Fang
    • , Hongming Weng
    •  & Chen Fang
  • Article |

    Topological quantum chemistry and newly developed codes are used to analyse and compute the topological properties of materials in a large crystal database and to identify new topological phases, finding that more than 27 per cent of all materials in nature are topological.

    • M. G. Vergniory
    • , L. Elcoro
    • , Claudia Felser
    • , Nicolas Regnault
    • , B. Andrei Bernevig
    •  & Zhijun Wang
  • Article |

    An algorithm based on symmetry indicators is used to search a crystallographic database and finds thousands of candidate topological materials, which could be exploited in next-generation electronic devices.

    • Feng Tang
    • , Hoi Chun Po
    • , Ashvin Vishwanath
    •  & Xiangang Wan
  • Article |

    Single-cell profiling is used to create a molecular-level atlas of cell differentiation trajectories during gastrulation and early organogenesis in the mouse.

    • Blanca Pijuan-Sala
    • , Jonathan A. Griffiths
    • , Carolina Guibentif
    • , Tom W. Hiscock
    • , Wajid Jawaid
    • , Fernando J. Calero-Nieto
    • , Carla Mulas
    • , Ximena Ibarra-Soria
    • , Richard C. V. Tyser
    • , Debbie Lee Lian Ho
    • , Wolf Reik
    • , Shankar Srinivas
    • , Benjamin D. Simons
    • , Jennifer Nichols
    • , John C. Marioni
    •  & Berthold Göttgens
  • Article |

    Data from single-cell combinatorial-indexing RNA-sequencing analysis of 2 million cells from mouse embryos between embryonic days 9.5 and 13.5 are compiled in a cell atlas of mouse organogenesis, which provides a global view of developmental processes occurring during this critical period.

    • Junyue Cao
    • , Malte Spielmann
    • , Xiaojie Qiu
    • , Xingfan Huang
    • , Daniel M. Ibrahim
    • , Andrew J. Hill
    • , Fan Zhang
    • , Stefan Mundlos
    • , Lena Christiansen
    • , Frank J. Steemers
    • , Cole Trapnell
    •  & Jay Shendure
  • Article |

    In a rat model of multiple sclerosis, β-synuclein-specific T cells induce inflammation and pathological changes in the grey matter of the central nervous system; these cells were also found in higher numbers in patients with multiple sclerosis, particularly those with a chronic progressive course.

    • Dmitri Lodygin
    • , Moritz Hermann
    • , Nils Schweingruber
    • , Cassandra Flügel-Koch
    • , Takashi Watanabe
    • , Corinna Schlosser
    • , Arianna Merlini
    • , Henrike Körner
    • , Hsin-Fang Chang
    • , Henrike J. Fischer
    • , Holger M. Reichardt
    • , Marta Zagrebelsky
    • , Brit Mollenhauer
    • , Sebastian Kügler
    • , Dirk Fitzner
    • , Jens Frahm
    • , Christine Stadelmann
    • , Michael Haberl
    • , Francesca Odoardi
    •  & Alexander Flügel
  • Letters

  • Letter |

    A single logical qubit is encoded, manipulated and read out using a superposition of displaced squeezed states of the harmonic motion of a trapped calcium ion.

    • C. Flühmann
    • , T. L. Nguyen
    • , M. Marinelli
    • , V. Negnevitsky
    • , K. Mehta
    •  & J. P. Home
  • Letter |

    Angle-resolved photoemission spectroscopy is used to characterize the surface states of bismuth iodide, providing experimental evidence of a weak topological insulator state that had previously been only theoretically predicted.

    • Ryo Noguchi
    • , T. Takahashi
    • , K. Kuroda
    • , M. Ochi
    • , T. Shirasawa
    • , M. Sakano
    • , C. Bareille
    • , M. Nakayama
    • , M. D. Watson
    • , K. Yaji
    • , A. Harasawa
    • , H. Iwasawa
    • , P. Dudin
    • , T. K. Kim
    • , M. Hoesch
    • , V. Kandyba
    • , A. Giampietri
    • , A. Barinov
    • , S. Shin
    • , R. Arita
    • , T. Sasagawa
    •  & Takeshi Kondo
  • Letter |

    A mechanism for creating patterns of iridescent structural colour by total internal reflection of light beams along a concave optical interface leading to interference is described, for complex microscopic systems and for systems as simple as condensed water drops.

    • Amy E. Goodling
    • , Sara Nagelberg
    • , Bryan Kaehr
    • , Caleb H. Meredith
    • , Seong Ik Cheon
    • , Ashley P. Saunders
    • , Mathias Kolle
    •  & Lauren D. Zarzar
  • Letter |

    The ancestral tribosphenic therian chewing stroke is conserved in Monodelphis domestica, and couples tooth-row eversion and inversion in jaw opening and closing, respectively, with a rotational grinding stroke.

    • Bhart-Anjan S. Bhullar
    • , Armita R. Manafzadeh
    • , Juri A. Miyamae
    • , Eva A. Hoffman
    • , Elizabeth L. Brainerd
    • , Catherine Musinsky
    •  & Alfred W. Crompton
  • Letter |

    Evidence from hippocampal place cells shows that path-integration gain, previously thought to be a constant factor in the computation of location, is flexible and can be rapidly fine-tuned.

    • Ravikrishnan P. Jayakumar
    • , Manu S. Madhav
    • , Francesco Savelli
    • , Hugh T. Blair
    • , Noah J. Cowan
    •  & James J. Knierim
  • Letter |

    There are no new oligodendrocytes in potentially remyelinated multiple sclerosis shadow plaques, although oligodendrocyte generation is increased in the normal appearing white matter of patients with aggressive disease, informing the development of new therapies.

    • Maggie S. Y. Yeung
    • , Mehdi Djelloul
    • , Embla Steiner
    • , Samuel Bernard
    • , Mehran Salehpour
    • , Göran Possnert
    • , Lou Brundin
    •  & Jonas Frisén
  • Letter |

    Single-nucleus RNA sequencing analysis identifies different subclusters of oligodendroglia in white matter from individuals with multiple sclerosis compared with controls, and these differences may be important for understanding disease progression.

    • Sarah Jäkel
    • , Eneritz Agirre
    • , Ana Mendanha Falcão
    • , David van Bruggen
    • , Ka Wai Lee
    • , Irene Knuesel
    • , Dheeraj Malhotra
    • , Charles ffrench-Constant
    • , Anna Williams
    •  & Gonçalo Castelo-Branco
  • Letter |

    Singlet molecular oxygen, produced by indoleamine 2,3-dioxygenase 1 activity, gives rise to a signalling molecule that regulates arterial relaxation under inflammatory conditions.

    • Christopher P. Stanley
    • , Ghassan J. Maghzal
    • , Anita Ayer
    • , Jihan Talib
    • , Andrew M. Giltrap
    • , Sudhir Shengule
    • , Kathryn Wolhuter
    • , Yutang Wang
    • , Preet Chadha
    • , Cacang Suarna
    • , Oleksandra Prysyazhna
    • , Jenna Scotcher
    • , Louise L. Dunn
    • , Fernanda M. Prado
    • , Nghi Nguyen
    • , Jephthah O. Odiba
    • , Jonathan B. Baell
    • , Johannes-Peter Stasch
    • , Yorihiro Yamamoto
    • , Paolo Di Mascio
    • , Philip Eaton
    • , Richard J. Payne
    •  & Roland Stocker
  • Letter |

    The authors show that circulating tumour cells can be found in association with neutrophils, an interaction which supports their proliferation and their ability to seed metastasis.

    • Barbara Maria Szczerba
    • , Francesc Castro-Giner
    • , Marcus Vetter
    • , Ilona Krol
    • , Sofia Gkountela
    • , Julia Landin
    • , Manuel C. Scheidmann
    • , Cinzia Donato
    • , Ramona Scherrer
    • , Jochen Singer
    • , Christian Beisel
    • , Christian Kurzeder
    • , Viola Heinzelmann-Schwarz
    • , Christoph Rochlitz
    • , Walter Paul Weber
    • , Niko Beerenwinkel
    •  & Nicola Aceto
  • Letter |

    A strategy using droplet-based and barcode-linked sequencing captures multiplex chromatin interactions at single-molecule precision, and here provides topological insight into chromatin structures and transcription in Drosophila.

    • Meizhen Zheng
    • , Simon Zhongyuan Tian
    • , Daniel Capurso
    • , Minji Kim
    • , Rahul Maurya
    • , Byoungkoo Lee
    • , Emaly Piecuch
    • , Liang Gong
    • , Jacqueline Jufen Zhu
    • , Zhihui Li
    • , Chee Hong Wong
    • , Chew Yee Ngan
    • , Ping Wang
    • , Xiaoan Ruan
    • , Chia-Lin Wei
    •  & Yijun Ruan

Amendments & Corrections

  • Author Correction |

    • Simone L. Park
    • , Anthony Buzzai
    • , Jai Rautela
    • , Jyh Liang Hor
    • , Katharina Hochheiser
    • , Maike Effern
    • , Nathan McBain
    • , Teagan Wagner
    • , Jarem Edwards
    • , Robyn McConville
    • , James S. Wilmott
    • , Richard A. Scolyer
    • , Thomas Tüting
    • , Umaimainthan Palendira
    • , David Gyorki
    • , Scott N. Mueller
    • , Nicholas D. Huntington
    • , Sammy Bedoui
    • , Michael Hölzel
    • , Laura K. Mackay
    • , Jason Waithman
    •  & Thomas Gebhardt
  • Author Correction |

    • David M. Hyman
    • , Sarina A. Piha-Paul
    • , Helen Won
    • , Jordi Rodon
    • , Cristina Saura
    • , Geoffrey I. Shapiro
    • , Dejan Juric
    • , David I. Quinn
    • , Victor Moreno
    • , Bernard Doger
    • , Ingrid A. Mayer
    • , Valentina Boni
    • , Emiliano Calvo
    • , Sherene Loi
    • , Albert C. Lockhart
    • , Joseph P. Erinjeri
    • , Maurizio Scaltriti
    • , Gary A. Ulaner
    • , Juber Patel
    • , Jiabin Tang
    • , Hannah Beer
    • , S. Duygu Selcuklu
    • , Aphrothiti J. Hanrahan
    • , Nancy Bouvier
    • , Myra Melcer
    • , Rajmohan Murali
    • , Alison M. Schram
    • , Lillian M. Smyth
    • , Komal Jhaveri
    • , Bob T. Li
    • , Alexander Drilon
    • , James J. Harding
    • , Gopa Iyer
    • , Barry S. Taylor
    • , Michael F. Berger
    • , Richard E. Cutler Jr
    • , Feng Xu
    • , Anna Butturini
    • , Lisa D. Eli
    • , Grace Mann
    • , Cynthia Farrell
    • , Alshad S. Lalani
    • , Richard P. Bryce
    • , Carlos L. Arteaga
    • , Funda Meric-Bernstam
    • , José Baselga
    •  & David B. Solit
  • Publisher Correction |

    • Norbert Hilf
    • , Sabrina Kuttruff-Coqui
    • , Katrin Frenzel
    • , Valesca Bukur
    • , Stefan Stevanović
    • , Cecile Gouttefangeas
    • , Michael Platten
    • , Ghazaleh Tabatabai
    • , Valerie Dutoit
    • , Sjoerd H. van der Burg
    • , Per thor Straten
    • , Francisco Martinez-Ricarte
    • , Berta Ponsati
    • , Hideho Okada
    • , Ulrik Lassen
    • , Arie Admon
    • , Christian H. Ottensmeier
    • , Alexander Ulges
    • , Sebastian Kreiter
    • , Andreas von Deimling
    • , Marco Skardelly
    • , Denis Migliorini
    • , Judith R. Kroep
    • , Manja Idorn
    • , Jordi Rodon
    • , Jordi Piro
    • , Hans S. Poulsen
    • , Bracha Shraibman
    • , Katy McCann
    • , Regina Mendrzyk
    • , Martin Lower
    • , Monika Stieglbauer
    • , Cedrik M. Britten
    • , David Capper
    • , Marij J. P. Welters
    • , Juan Sahuquillo
    • , Katharina Kiesel
    • , Evelyna Derhovanessian
    • , Elisa Rusch
    • , Lukas Bunse
    • , Colette Song
    • , Sandra Heesch
    • , Claudia Wagner
    • , Alexandra Kemmer-Bruck
    • , Jorg Ludwig
    • , John C. Castle
    • , Oliver Schoor
    • , Arbel D. Tadmor
    • , Edward Green
    • , Jens Fritsche
    • , Miriam Meyer
    • , Nina Pawlowski
    • , Sonja Dorner
    • , Franziska Hoffgaard
    • , Bernhard Rossler
    • , Dominik Maurer
    • , Toni Weinschenk
    • , Carsten Reinhardt
    • , Christoph Huber
    • , Hans-Georg Rammensee
    • , Harpreet Singh-Jasuja
    • , Ugur Sahin
    • , Pierre-Yves Dietrich
    •  & Wolfgang Wick
  • Publisher Correction |

    • François-Xavier Weill
    • , Daryl Domman
    • , Elisabeth Njamkepo
    • , Abdullrahman A. Almesbahi
    • , Mona Naji
    • , Samar Saeed Nasher
    • , Ankur Rakesh
    • , Abdullah M. Assiri
    • , Naresh Chand Sharma
    • , Samuel Kariuki
    • , Mohammad Reza Pourshafie
    • , Jean Rauzier
    • , Abdinasir Abubakar
    • , Jane Y. Carter
    • , Joseph F. Wamala
    • , Caroline Seguin
    • , Christiane Bouchier
    • , Thérèse Malliavin
    • , Bita Bakhshi
    • , Hayder H. N. Abulmaali
    • , Dhirendra Kumar
    • , Samuel M. Njoroge
    • , Mamunur Rahman Malik
    • , John Kiiru
    • , Francisco J. Luquero
    • , Andrew S. Azman
    • , Thandavarayan Ramamurthy
    • , Nicholas R. Thomson
    •  & Marie-Laure Quilici
Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing