The Journal of Physical Chemistry Letters最新文献_第2页

Directional Light Scattering of a Single Si Nanoparticle Revealed by Three-Dimensional Near-Field Optical Microscopy

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-31 DOI: 10.1021/acs.jpclett.5c00254

Kohei Imura, Takuya Matsuura

引用次数: 0

Inhomogeneous Strain Drives Formation of Single-Crystal PdH toward Quenching the Metastable Phase via High Pressure Sintering

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-30 DOI: 10.1021/acs.jpclett.5c00717

Libo Sheng, Haoliang Shi, Yongming Sui, Huiling Li, Ankang Chen, Jiewen Liu, Jingqi Ruan, Kaixiang Jin, Yan Li, Defang Duan, Bo Zou

{"title":"Inhomogeneous Strain Drives Formation of Single-Crystal PdH toward Quenching the Metastable Phase via High Pressure Sintering","authors":"Libo Sheng, Haoliang Shi, Yongming Sui, Huiling Li, Ankang Chen, Jiewen Liu, Jingqi Ruan, Kaixiang Jin, Yan Li, Defang Duan, Bo Zou","doi":"10.1021/acs.jpclett.5c00717","DOIUrl":"https://doi.org/10.1021/acs.jpclett.5c00717","url":null,"abstract":"In rational precursor design, nanostructuring strategies could reduce the synthesis pressure and quench metastable phases under ambient conditions, but the mechanisms are unclear. Here, we employed in situ high pressure angle dispersive X-ray diffraction and transmission electron microscopy to trace the distinct hydrogenatison pathways of Pd icosahedral (Pdico) and octahedral (Pdoct) nanoparticles. Our findings reveal that inhomogeneous strain significantly influences nanoparticle detwinning and aggregation under high pressure. PdicoH develops a texture at 30 GPa and could be sintered into a two-dimensional single-crystal PdH with a (111) oriented plane. In contrast, PdoctH nucleates individually during high-pressure sintering, forming polycrystalline PdH0.706 with (111) and (100) planes. Computational simulations further show that the (111) plane of Pd has a high energy barrier for hydrogen release. Thus, regulating PdH nanoparticles with inhomogeneous strain through pressure and temperature to achieve a (111)-dominated structure is crucial for quenching metastable PdH at ambient pressure.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"23 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalized Velocity Sampling at a Transition State and Nonadiabatic Dynamics of Four-Membered Heterocyclic Peroxides

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-29 DOI: 10.1021/acs.jpclett.5c00625

Jian-Ge Zhou, Yinan Shu, Brianna Michaels, Shan Yang, Oleg Prezhdo

引用次数: 0

Design of Perovskite Nanowire Solar Cells with an Adjustable Transmission Visible Light Spectrum

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-28 DOI: 10.1021/acs.jpclett.5c00493

Tianjun Chen, Guijia Feng, Enxiang Jiao, Hui Zhou, Li Ding, Zhongliang Gao

{"title":"Design of Perovskite Nanowire Solar Cells with an Adjustable Transmission Visible Light Spectrum","authors":"Tianjun Chen, Guijia Feng, Enxiang Jiao, Hui Zhou, Li Ding, Zhongliang Gao","doi":"10.1021/acs.jpclett.5c00493","DOIUrl":"https://doi.org/10.1021/acs.jpclett.5c00493","url":null,"abstract":"Translucent film solar cells have significant applications in various scenarios, indicating strong potential for application. However, translucent film solar cells typically only regulate the transmitted light intensity and cannot flexibly adjust the transmission wavelength. Here, a perovskite nanowire (PNW) solar cell that utilizes the light capture performance of a single nanowire to achieve flexible wavelength adjustment in the visible light range was designed. The characteristic scale of a PNW enables the adjustment of absorption coefficients (Qabs) at different wavelengths, combined with the constraint relationship among reflectivity, absorptivity, and transmissivity, to adjust the wavelength of the transmittance spectrum of the solar cell. In addition, the PNW light capture effect increases the open circuit voltage (VOC) by about 5%. Finally, the light transmitted by PNW solar cells can vary among yellow, red, and purple, and the highest PCE can be maintained at around 20%, which enhances the application of transparent solar cells.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"222 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the Selectivity Differences of NO Electroreduction on Ag and Au Electrodes

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-28 DOI: 10.1021/acs.jpclett.5c00656

Lin Li, Dong Luan, Jun Long, Jianping Xiao

{"title":"Understanding the Selectivity Differences of NO Electroreduction on Ag and Au Electrodes","authors":"Lin Li, Dong Luan, Jun Long, Jianping Xiao","doi":"10.1021/acs.jpclett.5c00656","DOIUrl":"https://doi.org/10.1021/acs.jpclett.5c00656","url":null,"abstract":"Although noble metals Ag and Au have similar chemical reactivities, their catalytic selectivity for NO electroreduction is significantly different. Namely, hydroxylamine is often considerably produced on Ag while not observed on the Au electrode. In this study, first-principles calculations and the electric field controlling constant potential (EFC–CP) method are adopted to unveil the underlying reasons. We first reveal a distinct NO* adsorption configuration, vertical on Ag and inclined on Au, leading to different reduction pathways to NOH* and HNO*, respectively. Via complete electrochemical barrier calculations and detailed kinetic analysis, we find the hydroxylamine selectivity difference between Ag and Au is mainly induced by adsorption strength of NH2OH*. On Ag, the obtained NH2OH* prefers to desorb and produce hydroxylamine, while NH2OH* is bonded strongly to Au and favors further reduction to ammonia. The study advances our understanding of factors regulating product selectivity, providing crucial insights for designing NO electroreduction catalysts toward hydroxylamine production.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"30 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boosting Photovoltaic Efficiency: The Role of Longitudinal Carrier Transport in Carbon Dot-Modified Perovskite Films

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-28 DOI: 10.1021/acs.jpclett.5c00637

Xinlei Zhang, Jing Leng, Shengli Zhao, Qing Yang, Peng Xu, Shiqi Rong, Yan Xu, Wenming Tian, Shengye Jin

{"title":"Boosting Photovoltaic Efficiency: The Role of Longitudinal Carrier Transport in Carbon Dot-Modified Perovskite Films","authors":"Xinlei Zhang, Jing Leng, Shengli Zhao, Qing Yang, Peng Xu, Shiqi Rong, Yan Xu, Wenming Tian, Shengye Jin","doi":"10.1021/acs.jpclett.5c00637","DOIUrl":"https://doi.org/10.1021/acs.jpclett.5c00637","url":null,"abstract":"Defect passivation engineering, an effective strategy to optimize grain boundaries and reduce defects in organic–inorganic hybrid perovskites, has been widely used to improve device performance; however, knowledge of its impact on the carrier transport property is still limited. Herein, we take carbon dot (CD) passivation as an example to explore the effect of surface modification on the longitudinal carrier diffusivity (D) in CH3NH3PbI3 perovskite films by using transient reflection spectroscopy. The results show that the D value remarkably increases from 0.30 cm2 s–1 in unmodified film to 1.02 cm2 s–1 in CD-modified film due to their enhanced conductivity, where CDs act as a highly conductive interstitial medium to enhance intergrain contact. Benefiting from the increase in carrier diffusivity, the power conversion efficiency of CD-modified perovskite solar cells (PSCs) increased from 23.1% (unmodified) to 25.4%, strongly confirming the positive effect of CD passivation on the PSC performance. Our finding highlights a novel avenue for enhancing PSC performance through the improvement of longitudinal carrier diffusivity via high-conductivity nanomaterial doping.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"215 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control of Heat Flow in a Soft Matter: Anisotropic Heat Transport in a Discotic Columnar Liquid Crystal Capable of Reversible Alignment Switching

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-28 DOI: 10.1021/acs.jpclett.5c00354

Meguya Ryu, Ryosuke Takehara, Shuji Kamegaki, Hiromichi Yokoyama, Takashi Kajitani, Junko Morikawa, Takanori Fukushima

{"title":"Control of Heat Flow in a Soft Matter: Anisotropic Heat Transport in a Discotic Columnar Liquid Crystal Capable of Reversible Alignment Switching","authors":"Meguya Ryu, Ryosuke Takehara, Shuji Kamegaki, Hiromichi Yokoyama, Takashi Kajitani, Junko Morikawa, Takanori Fukushima","doi":"10.1021/acs.jpclett.5c00354","DOIUrl":"https://doi.org/10.1021/acs.jpclett.5c00354","url":null,"abstract":"Discotic columnar liquid crystals (LCs) hold promise as thermal interface materials that allow heat to flow preferentially in the desired direction, whereas their heat transport properties remain elusive, particularly in terms of anisotropy related to their columnar alignments. Using a discotic columnar LC (TPC4F6) that allows for complete alignment control by applying mechanical shear, we investigated the alignment dependence of the thermal diffusivity using a dedicated setup for micro temperature wave analysis. We found that the thermal diffusivity in the direction perpendicular to the columns is larger, compared with the direction along the columns. Interestingly, this trend is opposite to that observed for a single crystal system composed of an identical aromatic core motif. This result demonstrates that the anisotropy of heat transport can change depending on the phases of materials even when they have similar compositions, providing insights into the design of organic materials for thermal management.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"131 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Excitonic Fano Scattering Behaviors of Carbon Nanotubes from Interference with Dispersant

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-28 DOI: 10.1021/acs.jpclett.5c00319

Seongjoo Hwang, In-Seung Choi, Sang-Yong Ju

{"title":"Excitonic Fano Scattering Behaviors of Carbon Nanotubes from Interference with Dispersant","authors":"Seongjoo Hwang, In-Seung Choi, Sang-Yong Ju","doi":"10.1021/acs.jpclett.5c00319","DOIUrl":"https://doi.org/10.1021/acs.jpclett.5c00319","url":null,"abstract":"Rayleigh scattering behavior of single-walled carbon nanotubes (SWNTs) has been instrumental in understanding their exciton behaviors, but their bulk scattering interactions with molecules in dispersion remain unexplored. Here, we found the excitonic Fano scattering behaviors in interfering dispersant-wrapped SWNT dispersions and characterized them both experimentally and theoretically. Using an integrating sphere, we differentiated scattering spectra from extinction and absorption spectra at both single-chirality and ensemble levels. The scattering spectra revealed asymmetric excitonic and exciton–phonon bands contrasting Lorentzian shapes from noninterfering dispersant-wrapped SWNT. A scattering cross-sectional equation, derived from Fano resonance theory and incorporating the dielectric constants of SWNT and its environment, successfully simulates the experimental result. The analysis underscored the impact of the surrounding molecules on the excitonic interactions, with significant implications for the optoelectronic properties of SWNTs. The findings suggest potential applications of SWNTs in sensory and modulator schemes, where the optoelectronic response of nanomaterials is tuned by selection of molecules.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"2 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical Mapping of Supramolecular Self-Assembled Monolayers via Atomic Force Microscopy-Based Infrared with a Nanometer-Scale Lateral Resolution

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-27 DOI: 10.1021/acs.jpclett.5c00360

Alexandre Dazzi, Frank Palmino, Ariane Deniset-Besseau, Jérémie Mathurin, Vincent Luzet, Peter De Wolf, Qichi Hu, Chunzeng Li, Cassandra Phillips, Frédéric Chérioux

引用次数: 0

Zero Phonon Line and Near-Infrared Luminescence in Cs4CdSb2–xCrxCl12 Quadruple-Layered Halide Double Perovskite

IF 6.475 2区化学

The Journal of Physical Chemistry Letters Pub Date : 2025-03-27 DOI: 10.1021/acs.jpclett.4c03246

Tiasha Roy, Bhyrappa Puttaiah, Chandran Sudakar

{"title":"Zero Phonon Line and Near-Infrared Luminescence in Cs4CdSb2–xCrxCl12 Quadruple-Layered Halide Double Perovskite","authors":"Tiasha Roy, Bhyrappa Puttaiah, Chandran Sudakar","doi":"10.1021/acs.jpclett.4c03246","DOIUrl":"https://doi.org/10.1021/acs.jpclett.4c03246","url":null,"abstract":"There is growing interest in understanding the optoelectronic properties of inorganic lead-free layered halide double perovskites (LHDPs). Here, we report a distinctive sharp zero phonon line (ZPL) emission at 727 nm and an intense, broad near-infrared (NIR) emission at 757 nm from the photoluminescence (PL) spectra measured at temperatures below 217 K, resulting from Cr3+ substitution in Cs4CdSb2Cl12 LHDPs. Pristine Cs4CdSb2Cl12 exhibits only a weak and broad self-trapped excitonic emission centered around 590 nm. On the contrary, an NIR emission (fwhm = 72.5 nm) at 757 nm is also observed at 300 K in Cs4CdSb2–xCrxCl12 (x = 0.05 to 0.3) originating from the d–d transition of Cr3+ ions. This broad mode evolves into 2 distinct emissions: a ZPL (at 727 nm) and an intense, broad NIR (at 746 nm) sideband below 217 K. The ZPL originates from the spin-allowed 4T2g → 4A2g d–d transition from Cr3+. ZPL intensity increases with Cr3+ substitution. This study demonstrates the promising optical properties of Cr3+-substituted LHDPs, indicating their potential for future applications in optoelectronic devices.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"61 1","pages":""},"PeriodicalIF":6.475,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0