2024年1月8日 · Here we combine a variety of optical spectroscopy techniques, such as excitation emission maps (EEMs), ultrafast transient absorption (TA), and two-dimensional electronic spectroscopy (2DES), to study the nature and the dynamics of the excited states of isolated GNRs in solution. We find that the primary photoexcitations are strongly bound ...

Figure 2a shows a 2DES map of GNR-AHM-3 in the NIR, following band-edge excitation, for t 2 = 60 fs. The map is dominated by a strongly elongated positive peak along the diagonal, which is assigned to the combination of ground state bleaching (GSB) and stimulated emission (SE) of the inhomogeneously broadened excitonic transition. The map

2025年3月19日 · We investigate the carrier transport characteristics of perforated graphene layer (PGL) composed of arrays of interdigital coplanar graphene microribbons (GMRs) connected by graphene nanoribbon (GNR) bridges. We analyze their operation at room-temperature. Under an applied bias voltage, two-dimensional electron and hole systems (2DES and 2DHS) form in adjacent GMRs. The terminal current in ...

We report a novel type of structurally defined graphene nanoribbons (GNRs) with uniform width of 1.7 nm and average length up to 58 nm. These GNRs are decorated with pending Diels–Alder cycloadducts of anthracenyl units and N - n -hexadecyl maleimide.

Here we employ two-dimensional electronic spectroscopy (2DES) to study the electronic structure and dynamics of the 60 nm long GNR in solution. The 2DES setup is based on the partially collinear pump-probe geometry using a birefringent interferometer for the genera-

2025年3月19日 · Under an applied bias voltage, two-dimensional electron and hole systems (2DES and 2DHS) form in adjacent GMRs. The terminal current in these PGL structures is primarily governed by thermionic transport across the GNR bridges.

2019年1月1日 · Here we employ two-dimensional electronic spectroscopy (2DES) to study the electronic structure and dynamics of the 60 nm long GNR in solution. The 2DES setup is based on the

二维电子光谱 （2DES）是一种超快激光光谱技术，可以探测样品的电子、能量和空间分布。 它类似于 核磁共振技术，能以高空间分辨率确定复杂的分子结构，是一种能使结构生物学发生革命性变化的光谱技术。 二维电子光谱（2DES）是 "终极 "时间分辨 非线性光学 实验设备，因为它能提供有关系统三阶非线性响应的最大信息量，而且任何其他三阶非线性光谱（如泵浦探针）都包含在二维光谱中。 在具有多个相互作用成分的系统中，二维非线性光谱可充分发挥其威力。 2DES可 …

2024年1月8日 · Here we employ two-dimensional electronic spectroscopy to unravel the optical properties of isolated GNRs and disentangle the transitions underlying their broad and rather featureless absorption band. We observe that vibronic coupling, typically neglected in modeling, plays a dominant role in the optical properties of GNRs.

2023年11月9日 · Two-dimensional electronic spectroscopy (2DES) is an ultrafast optical technique that can study relaxation dynamics with femtosecond time resolution at an...