Toyota CRDL and Denso Corp. have applied for patents connected to the topic of this Letter. Commercialization with the patents may well cause economic Positive aspects to your authors. Skip to principal material Thanks for checking out nature.com. That you are employing a browser Edition with limited assistance for CSS. https://www.facebook.com/permalink.php?story_fbid=pfbid0NNw1bv5aZgz2gP6Xexzvnd1Ao5UWCkERH9EPmqcWDoBnCk5qru6EFBWo3EUbjCCil&id=61560512640678&__cft__[0]=AZWFk5fQD2jgTAVDPox6QFfGnO4GhFCkTVmUz88qxE6eoi-YB9q1i4d2GzMmKCHetqmrjvDlgrtjPFTwT2bBn_j4ZTWFtVPZcAKn-U5Eq2Jq2HppTEhikD3VPLXTpulKKLpTnVqC3ZwRlVCYAAinHd8_NY38Wlg12EeLkf1DoIvxxyOiQGhTL6uA5Cggbw_G11oKNLOZSaMNAD2mLbNRgPf3&__tn__=%2CO%2CP-R